High RH Levels & Leaf Curling

[PooToe]

@PooToe
So, dear Mr Toe, or should I say "Poo"? (Sorry, just feeling a bit silly today)

Either will suffice!

I have found your response and comments to be very helpful and actually inline with what I was already thinking, to some degree. As for the flushing part, I haven't done it and I really didn't think it made a lot of sense, but what do I know?

I mentored someone on another forum that had similar gardening experience like you, which I think made it all the more frustrating! I made a few suggestions and a lot of bad jokes on his thread but we got his auto plant back online and he was able to take it to harvest. It was his first grow. He decided to try his hand at outdoor growing and he did very well. I see you very much like him. You have the knowledge and experience. You just need a few pointers that are specific to cannabis. You'll be teaching people how to grow weed on the internet in no time!!!

I have actually watched a couple of Dr Bugbee's videos, and while they sometimes go way over my head (I am horrible with math), I do see that he has the science and facts behind him. I absolutely get what you're saying about the "bro science". I think too many people growing want to be a YouTuber and so they make videos about crap (just my opinion of course). I must admit, I do enjoy watching 'The Dude Grows' (the Scotty guy makes me laugh), however, that's not to say I take everything they say and do as correct or right for me.

Love Scotty and I can say that I haven't found anything in the videos that I've watched of his that I can say are Broscience. He stays with the facts and I would recommend his advice to any new grower out there although we have to keep in mind that, as you know, growing advice depends alot on the climate you are growing in so although what he says is true it may not always apply to your situation. This is where grower experience comes into play.

In regards to Advanced Nutrients, I'm only using the Micro, Grow, Bloom trio. I have no idea about silica in regards to using it with cannabis, so I've not used that at all. I do use CalMag though because I read that it's a good addition and I think some people on here suggested it as well. I only bought the Biobizz because I was concerned about salt buildup. I have it, so I'm obviously going to use it at some point. I will, however, continue to use the Advanced Nutrients. I'm not sure how long because I don't have a lot of it left. I suppose I could just buy one single instead of going for the trio. I do wish I had paid more attention when I first started, I should have joined this forum back when I still had seedlings. You see, I didn't feed my seedlings at all and didn't give them the proper light at first, that's why I have plants of different sizes, and those 3 tallish ones. Also, when I went to buy the 2nd Batch of seeds, they were out of the ones I picked and they sent me an upgrade. Now, I know nothing about weed genetics. To be honest, I only wanted inexpensive seeds and I wanted feminized seeds. And that's what I got. However, my 2nd Batch do look quite different to my 1st Batch and I'm not sure if that's down to the better quality seeds, or that they got better light. Who knows. Anyway, getting back to things. Knowing what I know now, I realise I should have prepared my soil better. The mycorrhizae is something I've heard a lot about and if I was planting more, I'd definitely use it. I see people with seedlings that are bushy, you would have laughed if you had seen mine. They were little and spindly. I was totally unprepared for what I got into. I blame that damn bird seed weed plant I found outside (the one that ended up getting root rot because it didn't have any perlite in the soil and was holding too much water at the roots). I threw it out.

Here's my exact setup when it comes to nutrition. I try and stick to one brand line rather than mix up different ones just for continuity in regard to their reactions to each other. I use General Hydroponics FloraNova Grow and Bloom bases as my main fertilizer input. In the first few weeks of seedling and sprout I use Advanced Nutrients Voodoo Juice to raise the microbial life in the soil. I start using Silicate, Armor SI from GH, after the second node has appeared up until the 3rd week of flip. The silicate will help in strengthening the branching system you are growing and will aid in supporting those heavy dense flowers you'll be growing later in the process. It will also help in strengthening the cell walls to make it harder for bugs to bore into them. For Calcium and Magnesium, I use GH's CALi MAGic. Mycorhizzae from Xtreme Gardening on transplant. I use to use a product called Hormex to help in transplant shock but I haven't seen the plants get too stressed after transplant so I haven't used it in a while.

I would stick with your trio and feed accordingly. AN tends to dose heavily in their recommendations so you may want to experiment a little and feed at half dose to see how they react. One of the reasons I use GH is its economy. I haven't found a nutrient line that performs any better than GH's and GH tends to be lower priced than many of the other major nutrient lines. When I was working at a licensed grow op I had access to botanists and master growers. They all told me that brand doesn't matter. As long as the ratios were good that is all that was needed. The most I go with GH is half strength of their recommendations.

On your next grow here is the process I would recommend.

Pick up a soil that is specific for cannabis. You can use most basic potting mixes and amend them but the cannabis specific ones usually amend theirs to the needs of cannabis. Some popular ones are Fox Farms, Roots Organic Original, Happy Frog, Coast of Maine, Purple Cow, Pro Mix among others. There are countless recipes to make your own so I would encourage you to take a look and see what you like. Trust your gardening instincts. I like using Roots Organic Original. Roots Organic also has a more densely amended product called Lush that does very well also but is pricey. Check out their site and see if anything interests you.

SOIL & MEDIA — Aurora Innovations

www.aurorainnovations.com

If you like using Advanced Nutrients then continue. Again, nothing bad to say about their line other than price. Go with their Trio and Cal/Mag to start with. Using only these two products will make diagnosing any issues much easier as there are less things to blame!

That is all you really need as a basic setup to get to a successful harvest. You can add in silicate if you like.

Even though the soils I use are already amended, I like to start feeding a couple weeks into early veg. Most will continue feeding water only relying on the soil nutrition but I like to keep the pantry full! I've noticed that doing it this way keeps deficiencies to a minimum. The salt based fertilizers will provide the plant with immediately available nutrient ions while the organics in the soil do their breakdown dance and back up whatever you may be missing with the salt based ferts. I'm sure you've read about how salt based ferts will kill off your microbial community. This may have been true back in the day but todays salt based ferts made for cannabis don't seem to do that. I tested my fertilizers in a petrie dish with some agar and the agar grew like normal so my salt based ferts weren't affecting any of the natural processes happening on the organic side. BTW...microbes don't die. They only go into hibernation waiting for the ideal conditions they need to flourish.

Okay, so I'm going to continue with my Advanced Nutrients Micro, Grow, Bloom trio for about 3-4 weeks (or longer?) and once into actual budding, I will probably start using the Biobizz, and of course, I will continue with the CalMag. Is there anything else you would recommend me adding at this stage in the cycle?

I would stay away from the BioBizz for now and continue using the AN nutrients after you flip your light schedule. Switching from salt based to organic nutrients can have unintended consequences. Do a half dose blend of each along with a full dose of your micros and see how they react. Cal/Mag can be included in your feed solution as long as you will be immediately using it.

I am flipping tomorrow. Which brings me to another question. I normally run my lights on at 7.30pm and turning them off next day at 1.30pm. When I flip I want to run my lights from 12 noon on and off at 12 midnight. So that presents a problem. if I l turn the lights on tonight at 7.30pm, that means that my lights will have been running from 7.30pm tonight until midnight tomorrow night. That seems wrong to me. Should I turn them off earlier tonight, like turn them off at midnight, and then start fresh by turning them on at noon tomorrow? That won't cause any problems if I do that way, will it?
I hadn't really thought of how I'd do the time change and light change until just now (doh). I'm a horrible planner.

LOL! Nothing to worry about. Do as you say and there should be no negative affects on your plants. Some of my NorCal mentors used to tell me that before you flip your light schedule you want to leave the plants in the dark for 36 hrs to shock them into flowering earlier. Botanists told me that was not true but the dark period did have some benefits for different reasons so I wouldn't worry if I were you.

Good news. I received my clip-on fan today and it's actually bigger than I thought. Not huge, I just thought it would be tiny, it's 6". Now, when lights are off, it won't really do much good because that window is covered to prevent light from getting in, but once lights are on, I can open that window and hopefully it will draw in cooler air to blow into my space.

Your fan can be used for both bringing in fresh air on open window and also to circulate air in the space on closed window. I hope you ordered a good one because she's going to be doing some overtime!! For stationary fans I haven't found a better one than the Honeywell Turbo Force HT900. It moves lots of air and are practically bullet proof! The best part about it is the price. Cheap and effective. Right up my alley!!

This next question may seen insignificant, but does it matter where my dehumidifier is placed in relation to where my plants are? I had it right next to the plants, but it tends to emit heat and I felt that might be bad for the plants, so I moved it back about 5-feet. It's still drawing moisture out of the air, so I guess that's the point. But I wasn't sure if I should have it closer to the plants as I did initially or not.

Your grow space includes areas that you aren't growing in so if you want to dehumidify the air around your plants you'll need to dehumidify the entire space. Placing it farther away will keep the warm air from heating up the air temps in your immediate grow area so that is fine but having your fan circulating the air will equalize the humidity and temp levels eventually.

Oh, one other thing I wanted to bring up. The dehumidifier, heater and my light strip all have some lights on them. The heater and light strip are orange lights, the dehumidifier is a bluish white light. I've heard about making sure there's no light in the room once they are in flower mode. Right now, when I turn off all the lights and close the door, I cannot see any of the plants, nor any light reflecting onto the plants. Should I cover over those lights anyway? I've heard that even a little light can make a difference, but then I've heard that if you can't see your plants, it's dark enough. Should I err on the side of safety and do it anyway, just to be sure?

My rule of thumb is no lights at lights off any brighter than the moon. If you want you can always just tape over the offending lights.

In regards to giving some extra nutrients to address my magnesium deficiency, you're saying I should put some on the soil as well as doing the foliar spray?

Yes. Foliar will deliver it faster but the small amount that the foliar provides won't help for the long term. Foliar to get some immediately to the plant and in your feed solution so that the plant has a reservoir to pull from. While the foliar may fix the immediate problem your issue is not enough in the soil for the roots to take up. Foliar won't solve that problem. Remember that nutrient ions in the soil only get taken up when the plant accepts them from the microbe presenting it so it's ok to have a reserve in the soil.

I got some distilled water to mix it up, as I read that was better than water with minerals in it.

That's sort of subjective to your situation. Large grow operations use RO water to lessen the chances of unintended consequences of unknown minerals in the water affecting the plants ability to take up nutrients. In my area, I use tap water because the waters main mineral components are magnesium and calcium. No need for me to be removing it just to be adding it back in with cal/mag. You can probably look up the water reports for your area online to see what your water is like and if there is anything that you need to be aware of. I would imagine that if you've been feeding your other plants tap water without issue then it is safe for your cannabis plants. Some water districts like to use chlorine to clean their water. If this is the case with yours then you want to let the water sit for a day to allow the chorine to evaporate. Others will use a derivative called chloramines. These don't evaporate as easily but are also not as harsh on your plants so you can use the water with chloramines pretty much straight out of the tap or you can let it sit for a day or two in a bucket before you use it.

Obviously I'm not going to use 5-liters all at once, will it be okay to mix and leave for another time? If I can't mix and leave for later, then I have to try and work out how much to use in a 400ml spray bottle. When I use it for the soil, do I need to apply it before I water? I just watered last night, so that will have to wait if it needs to be watered in. I did sprinkle some of my egg shell powder onto the soil in some of my plants. I was making it up for my aquatic tanks, and didn't have enough to do all the plants, hopefully it won't hurt anything.

You can reserve some of the solution for around 2 weeks. What I would do is to mix up your foliar solution and whatever is left over use it in your feed solution.

Okie dokie, I think that's all my questions for you (as if that wasn't enough). You've been a great help in guiding me and I cannot thank you enough. I truly appreciate every single person that's answered my questions, even when I've asked the same question more than once. This is a great site, very helpful and I'd recommend it to anyone who wants to grow. Thank you, and I mean that sincerely.

That's why we're here!!!!

 

[ArtistZanner]

@PooToe

Thank you for answering more of my questions. Can you believe that on my first day of flipping, I now have yet another problem? The humidity is finally coming down nicely and my taco leaf situation looks like it's improving. But earlier I was looking at my plants and I found one of them with what I think is proof that something has been munching on my leaf. It's only on one plant, but it definitely looks like something has been eating my leaves. I did a separate post about it. Here in the UK, slugs and snails can be a problem, but I don't think either of those because they tend to leave a slimy trail that you can see on your leaves. I'm guessing maybe a caterpillar. I'm not really sure though. I will upload one of the photos (I took 2 photos, it's the same plant, just showing different leaves that had been bitten). I already went out and sprayed my Dawn dishwashing liquid + neem oil, as that's really the only thing I have to fight against pests. But I found my little sticky traps (bought them last year when we had a gnat problem in my small animal room). So I'm going to place those around my plants and see if they help. I really don't think this is a bug, the damage was done between last night and today and most bugs that can eat that quickly are like grasshoppers, and I'd see them easily. We don't have a lot of trouble with grasshoppers over here, but this is the time of year when caterpillars are eating things. I looked and I didn't see anything, but I'm going to have another look when I go out to put up my sticky traps.

I swear, it seems like it's one thing or another with my little garden. There is residue on the plants from where I sprayed the foliar spray the other day.

 

[PooToe]

@PooToe

Thank you for answering more of my questions. Can you believe that on my first day of flipping, I now have yet another problem? The humidity is finally coming down nicely and my taco leaf situation looks like it's improving. But earlier I was looking at my plants and I found one of them with what I think is proof that something has been munching on my leaf. It's only on one plant, but it definitely looks like something has been eating my leaves. I did a separate post about it. Here in the UK, slugs and snails can be a problem, but I don't think either of those because they tend to leave a slimy trail that you can see on your leaves. I'm guessing maybe a caterpillar. I'm not really sure though. I will upload one of the photos (I took 2 photos, it's the same plant, just showing different leaves that had been bitten). I already went out and sprayed my Dawn dishwashing liquid + neem oil, as that's really the only thing I have to fight against pests. But I found my little sticky traps (bought them last year when we had a gnat problem in my small animal room). So I'm going to place those around my plants and see if they help. I really don't think this is a bug, the damage was done between last night and today and most bugs that can eat that quickly are like grasshoppers, and I'd see them easily. We don't have a lot of trouble with grasshoppers over here, but this is the time of year when caterpillars are eating things. I looked and I didn't see anything, but I'm going to have another look when I go out to put up my sticky traps.

I swear, it seems like it's one thing or another with my little garden. There is residue on the plants from where I sprayed the foliar spray the other day. View attachment 2311820

Ain't growin' fun?

I would agree that that looks like a caterpillar eating. I would search for them on the undersides of the leaves. They seem to like to hide there at lights on and eat when lights are off.

I can usually catch a bug infestation pretty early so insecticidal soap tends to knock them down for the most part but when things get "buggy"(sorry) I'll go to my nuclear solution Azamax. It's a bit pricey but a little goes a long way and it is a great broad spectrum pesticide that is OMRI certified. The bottle says you can use it 10 days before harvest but I don't like to cut it that close. Another product you can use is Spinosad which is also an excellent broad spectrum pesticide that is not harmful to us or good bugs.

 

[ArtistZanner]

Ain't growin' fun?

I would agree that that looks like a caterpillar eating. I would search for them on the undersides of the leaves. They seem to like to hide there at lights on and eat when lights are off.

I can usually catch a bug infestation pretty early so insecticidal soap tends to knock them down for the most part but when things get "buggy"(sorry) I'll go to my nuclear solution Azamax. It's a bit pricey but a little goes a long way and it is a great broad spectrum pesticide that is OMRI certified. The bottle says you can use it 10 days before harvest but I don't like to cut it that close. Another product you can use is Spinosad which is also an excellent broad spectrum pesticide that is not harmful to us or good bugs.

When I went in tonight to put up those sticky traps, I noticed a couple other plants had been munched on as well. It's odd because the plant I photographed is in the very back and there's about 6 plants (with no bites) between that one and the other couple that had bites on the leaves. So out of 11, I've only noticed 3 that are affected, so far. All of the bites are on leaves at the top, none at the bottom or in the middle. How strange is that?
I mixed up more of the Neem solution and sprayed every single plant. I'm wondering if one of the nights when I opened the door and left it open, in order to lower humidity, is when the culprit got in. I initially thought caterpillar, but it's almost as if whatever is doing this is flying, or hopping, from the top of one plant to another. I just think it's really odd that a plant in the very back was attacked, but then all those others weren't, and then a couple closer to the front were attacked. If it had just been the one plant, I would think caterpillar, now I'm just not sure.

So tomorrow I am going to bring each plant out, put it up on the table (easier to view), and give it a good look over, hopefully find the muncher. I might even move all the plants out so I can view their growing space better. I must get this sorted before I have any flowers.
Talk about having a bunch of shit thrown at the new grower!

 

[PooToe]

When I went in tonight to put up those sticky traps, I noticed a couple other plants had been munched on as well. It's odd because the plant I photographed is in the very back and there's about 6 plants (with no bites) between that one and the other couple that had bites on the leaves. So out of 11, I've only noticed 3 that are affected, so far. All of the bites are on leaves at the top, none at the bottom or in the middle. How strange is that?
I mixed up more of the Neem solution and sprayed every single plant. I'm wondering if one of the nights when I opened the door and left it open, in order to lower humidity, is when the culprit got in. I initially thought caterpillar, but it's almost as if whatever is doing this is flying, or hopping, from the top of one plant to another. I just think it's really odd that a plant in the very back was attacked, but then all those others weren't, and then a couple closer to the front were attacked. If it had just been the one plant, I would think caterpillar, now I'm just not sure.

So tomorrow I am going to bring each plant out, put it up on the table (easier to view), and give it a good look over, hopefully find the muncher. I might even move all the plants out so I can view their growing space better. I must get this sorted before I have any flowers.
Talk about having a bunch of shit thrown at the new grower!

I was thinking the same thing when you described what you're seeing. Grasshoppers or some other leaf eating flyer.

 

[ArtistZanner]

@PooToe Well, I'm not sure what it was, but no more plants have been affected. I haven't found any new leaves with bite marks on them, or any other plants that have been attacked. I am hoping that by drenching my plants in that Neem solution, it either killed whatever it was, or drove it away. The thing is, because I've got the one window open, anything really can get in, and as you may or may not know, British windows don't have screens in them to keep bugs out, so it's open to the elements. Hopefully I won't find any new bites and this was just a small incident. None of the plants were affected so badly that it will cause a problem from here on (as long as the culprit doesn't come back).

On a different note, you might remember me saying that 3 of my plants don't look as good as the others, those are the ones that were most badly affected by the taco leaf, and also showed signs of some magnesium deficiency. Two of those were also the large plants that I cut to get their height under control. Anyway, I've decided that I'm giving those 3 plants 2 weeks (maybe less), and if they aren't looking better, I'm going to chuck them out. I'm finding that the more my plants grow, the harder it is to get to the lights to turn them on and off. You see, because there's no main electric in that building, I'm running everything off an extension (and I'm keeping track of how much I'm drawing, as to make sure I don't go over what it's rated for), I can't use a timer for the lights. So I have to manually turn the lights on and off. It's really not a problem, I'm here all the time anyway. But if those 3 plants don't start looking better, I'm going to throw them away in order to have more space for the better quality plants. One plant that I trimmed up is really bushing out nicely. In fact, the other eight are looking quite nice. But before I think about throwing any plants out, can I just ask .... once the plants have actual decent buds on them, will it hurt to move them out of the way, so I am not brushing against them? I mean, it shouldn't hurt the bud growth should it? As it is now, I literally have to either brush past the plants, or move them out of the way. And if they stretch before budding, they will be even harder to get past unless I move them out of the way. And it's the same issue when I need to water them. So, I guess I'm giving myself two weeks to think about what I should do. But I can't see continuing to deal with these 3 plants, and take up valuable space, if they aren't looking good. I almost want them to fail so I have an excuse to get rid of them. It really would be nice to have the extra space. We'll see. I may end up deciding before 2 weeks is up.

 

[PooToe]

@PooToe Well, I'm not sure what it was, but no more plants have been affected. I haven't found any new leaves with bite marks on them, or any other plants that have been attacked. I am hoping that by drenching my plants in that Neem solution, it either killed whatever it was, or drove it away. The thing is, because I've got the one window open, anything really can get in, and as you may or may not know, British windows don't have screens in them to keep bugs out, so it's open to the elements. Hopefully I won't find any new bites and this was just a small incident. None of the plants were affected so badly that it will cause a problem from here on (as long as the culprit doesn't come back).

Hahaha! I was just watching a video on YouTube about 10 things they have in America that they don't have in Europe and window screens is one of them!!!

I'm guessing it was a grasshopper and, as you said, got a mouthful of Neem and decided he'd had enough.

On a different note, you might remember me saying that 3 of my plants don't look as good as the others, those are the ones that were most badly affected by the taco leaf, and also showed signs of some magnesium deficiency. Two of those were also the large plants that I cut to get their height under control. Anyway, I've decided that I'm giving those 3 plants 2 weeks (maybe less), and if they aren't looking better, I'm going to chuck them out. I'm finding that the more my plants grow, the harder it is to get to the lights to turn them on and off. You see, because there's no main electric in that building, I'm running everything off an extension (and I'm keeping track of how much I'm drawing, as to make sure I don't go over what it's rated for), I can't use a timer for the lights. So I have to manually turn the lights on and off. It's really not a problem, I'm here all the time anyway. But if those 3 plants don't start looking better, I'm going to throw them away in order to have more space for the better quality plants. One plant that I trimmed up is really bushing out nicely. In fact, the other eight are looking quite nice. But before I think about throwing any plants out, can I just ask .... once the plants have actual decent buds on them, will it hurt to move them out of the way, so I am not brushing against them? I mean, it shouldn't hurt the bud growth should it? As it is now, I literally have to either brush past the plants, or move them out of the way. And if they stretch before budding, they will be even harder to get past unless I move them out of the way. And it's the same issue when I need to water them. So, I guess I'm giving myself two weeks to think about what I should do. But I can't see continuing to deal with these 3 plants, and take up valuable space, if they aren't looking good. I almost want them to fail so I have an excuse to get rid of them. It really would be nice to have the extra space. We'll see. I may end up deciding before 2 weeks is up.

No, no issue as long as you don't break any branches off while your brush past them.

You can do like I do when I'm culling clones. I'll usually take around 10 - 15 clones from a mother plant I have going to guarantee me females. Out of those 10 I'll take the 5 hardiest and get rid of the rest. When I get rid of them I like to "Midnight" garden. I'll drive around my neighborhood in the middle of the night to see who is worthy and plant one of the clone rejects in their garden too see how long it takes for them to notice it.

A couple of my neighbors transplanted them into pots and grew them in their backyard!!!! They had no idea how it got there and one told me someone must've dropped a seed but they transplanted them into a pot and grew them.

 

[ArtistZanner]

Hahaha! I was just watching a video on YouTube about 10 things they have in America that they don't have in Europe and window screens is one of them!!!

I'm guessing it was a grasshopper and, as you said, got a mouthful of Neem and decided he'd had enough.


No, no issue as long as you don't break any branches off while your brush past them.

You can do like I do when I'm culling clones. I'll usually take around 10 - 15 clones from a mother plant I have going to guarantee me females. Out of those 10 I'll take the 5 hardiest and get rid of the rest. When I get rid of them I like to "Midnight" garden. I'll drive around my neighborhood in the middle of the night to see who is worthy and plant one of the clone rejects in their garden too see how long it takes for them to notice it.

A couple of my neighbors transplanted them into pots and grew them in their backyard!!!! They had no idea how it got there and one told me someone must've dropped a seed but they transplanted them into a pot and grew them.

That made me laugh! I would have such a hard time keeping a straight face if I left a plant and then the person told me about it as if they didn't know where it came from. Great idea though.
Each time I go in and look at my plants, I am leaning more and more towards getting rid of those 3 plants. Initially I said I was going to give it 2 weeks to decide , but I am knocking it down to one week now. On one hand, I feel a bit greedy and want to keep all the plants, but the sensible part of me knows that if I get rid of those 3 funky plants, I will have more space to properly grow the others that are in better shape.
I've still not seen any new bites, so fingers crossed that it will be smooth sailing from here on. I do have another question for you. Because I turn my lights on & off manually, sometimes I get out there 10-15 minutes early when turning them off (because I want to get to bed) . As long as I'm not giving the plants more than 12 hours, it won't cause any problems if I deviate from time to time, will it? I don't mean like all the time though.

 

[PooToe]

That made me laugh! I would have such a hard time keeping a straight face if I left a plant and then the person told me about it as if they didn't know where it came from. Great idea though.
Each time I go in and look at my plants, I am leaning more and more towards getting rid of those 3 plants. Initially I said I was going to give it 2 weeks to decide , but I am knocking it down to one week now. On one hand, I feel a bit greedy and want to keep all the plants, but the sensible part of me knows that if I get rid of those 3 funky plants, I will have more space to properly grow the others that are in better shape.
I've still not seen any new bites, so fingers crossed that it will be smooth sailing from here on. I do have another question for you. Because I turn my lights on & off manually, sometimes I get out there 10-15 minutes early when turning them off (because I want to get to bed) . As long as I'm not giving the plants more than 12 hours, it won't cause any problems if I deviate from time to time, will it? I don't mean like all the time though.

They can go as long as 14 hours before you might run into revegging issues. I've seen others run a 14/10 schedule successfully. The logic is that the extra couple hours a day gives them a couple more hours to continue photosynthesizing.

For light energy I use a method called DLI(Daily Light Integral) which means that is the limit of usable PPFD that the plant can take in that day so as long I provide the volume of PPFD they can take up for that day it doesn't really matter how many hours the lights are on. The calculations used use 12 hours as a base for calculations.

 

[ArtistZanner]

They can go as long as 14 hours before you might run into revegging issues. I've seen others run a 14/10 schedule successfully. The logic is that the extra couple hours a day gives them a couple more hours to continue photosynthesizing.

For light energy I use a method called DLI(Daily Light Integral) which means that is the limit of usable PPFD that the plant can take in that day so as long I provide the volume of PPFD they can take up for that day it doesn't really matter how many hours the lights are on. The calculations used use 12 hours as a base for calculations.

I'm not talking about any huge changes. I'm only saying I might be 10-15 minutes late with shutting lights off. I don't want to wander into unknown territory by giving them too much or too little on a regular basis.