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First time grower browning curling leaves

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First time grower browning curling leaves

Jsimp342 167 Replies 15,960 Views
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You are definitely in better shape, but not out of the woods. Let me explain.

VPD chart1


You are in the red on 75* 40% RH. Even when you get to 60%, you are barely in range.

There is a lot more to VPD than this chart, and quite honestly the chart is somewhat misleading, but it works to get this point across. I think your problem is actually worse than this chart portrays because you really need to know leaf temps to calculate VPD, and since your lighting is not strong, it effects that as well. But I am guessing because we don't have all the data points.

If you cannot get control of your environment, your results will be sub-par. It's like 85% of the reason we grow indoors in the first place.

I'd like to see the plant that is recovering in the same pic to compare, but you may need to just muddle thru this grow and get some experience while you wait for a better climate in your lung room, or you spend some money and time on that RH issue.

Assuming you're as close as you are going to get on this grow, next thing to look at is your nutes. Where are we at with your watering and what nutes are you adding at this point? Any EC, PPM or PH data you can share and how you measured it?
 
You are definitely in better shape, but not out of the woods. Let me explain.

View attachment 1212258

You are in the red on 75* 40% RH. Even when you get to 60%, you are barely in range.

There is a lot more to VPD than this chart, and quite honestly the chart is somewhat misleading, but it works to get this point across. I think your problem is actually worse than this chart portrays because you really need to know leaf temps to calculate VPD, and since your lighting is not strong, it effects that as well. But I am guessing because we don't have all the data points.

If you cannot get control of your environment, your results will be sub-par. It's like 85% of the reason we grow indoors in the first place.

I'd like to see the plant that is recovering in the same pic to compare, but you may need to just muddle thru this grow and get some experience while you wait for a better climate in your lung room, or you spend some money and time on that RH issue.

Assuming you're as close as you are going to get on this grow, next thing to look at is your nutes. Where are we at with your watering and what nutes are you adding at this point? Any EC, PPM or PH data you can share and how you measured it?
I agree I think this will be good learning. I definitely need some good tools to get readings for Ec and ppm. For Ph I use a home freshwater master test kit to test bottled distilled water(what I use) and seems spot on 6.0 ph. Haven’t tested soil yet I read fox farm is great ph to start and watering with 6.0 ph water I thought I’d be good, can’t be too sure though I guess.

I have not added nutes yet since first time probably two weeks ago. been watering every 4 or so days that’s when they seem dried up. I was scared it seemed like the nutes started this.

Also what was very strange I tested ph of nutes (big bloom fox farm) mixed with my 6.0 ph distilled water and it brought ph up to 8!!! Everyone else has trouble with it lowering ph?? Maybe my testing is way off idk..

Pictures are all of same plant (healthier) from last couple weeks, seems like new growth is great but after a few days the leaves start to turn. Also included my test kit and nutes

the first picture is before trimming, second picture is after trimming and next two are growth since.
 

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Posted pictures of both plants today right after trimming off brown leaves. Took what I feel like was way to much off but It’s been over a week I think it was time to get them off. First pic of healthier plant second of the plant I thought I trimmed to hard.
 
Posted pictures of both plants today right after trimming off brown leaves. Took what I feel like was way to much off but It’s been over a week I think it was time to get them off. First pic of healthier plant second of the plant I thought I trimmed to hard.
 

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Could be lighting, but they look pretty lime to me. I'll let one of the soil guys chime in here, but they look hungry to me.
 
You think so? Probably only 3 ft tall
By the time the stretch is over they could be double that height. Only way to predict is if you have grown it before in these conditions. You good on heights to get the lights up above a 6 foot canopy?

could also lst them if you are up for it.

you could flip now or later this is where personal growing style kicks in.
 
By the time the stretch is over they could be double that height. Only way to predict is if you have grown it before in these conditions. You good on heights to get the lights up above a 6 foot canopy?

could also lst them if you are up for it.

you could flip now or later this is where personal growing style kicks in.
Ok makes sense so most likely I’ll get it where I can see it’s staying healthy and then Switch over. 6 ft tent so probably want them 4-41/2 foot tall?
 
By the time the stretch is over they could be double that height. Only way to predict is if you have grown it before in these conditions. You good on heights to get the lights up above a 6 foot canopy?

could also lst them if you are up for it.

you could flip now or later this is where personal growing style kicks in.
Took a turn for the worst ha droopy as fuckkk gave her some better nutes see what happens
 

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Are you letting those plants get completely dry? As in really dry?? If so, you risk nutrient burn. When plants get really dry, this will concentrate the dissolved solids, an when you water will burn your plants. You say youre giving Bloom nutrients?? Are these plants getting any Nitrogen?? If so, how mauch? Its a myth plants dont need as much Nitrogen during flowering vs veg. In reality, they need more, and they really need increasing amounts of all nutrients from Veg until the last 2 weeks of flowering. Then they should all be cut back. Low temperatures also decrease the need for nutrients, and you risk burning plants when temps get to low. I like temps between 78f-82f. Never lower than 74f when lights out, though I veg 24/7 so I keep my temps up. Whats your PH?? Whats your calcium, and magnesium source?

What Causes Brown Spots on Cannabis Plant Leaves?​

The brown spots on cannabis leaves is caused by a lack of nutrients such as calcium, nitrogen, potassium, manganese, making the cannabis leaves turn yellow and develop brown spots
 
can’t figure out what’s going on here any suggestions? Water till very wet and let dry out before more water, Temp 65 or so, humidity 35 or so, One Vivison 100watt light over each plant on 18 off 6, ph of water used around 6ph. In a tent with air moving 18 hrs per day
Why are you feeding bloom nutrients when you’re not in flower ? Plants in veg need nitrogen. How close are your lights ? Too close ?
can’t figure out what’s going on here any suggestions? Water till very wet and let dry out before more water, Temp 65 or so, humidity 35 or so, One Vivison 100watt light over each plant on 18 off 6, ph of water used around 6ph. In a tent with air moving 18 hrs per day
why feed bloom nutes if you’re not in flower ? Vegging plants need nitrogen! Sounds like the soil is/was way too wet, your humidity is low, are you transferring to bigger pots? Are you root bound ? How close are your lights? Too close ?
 
Why are you feeding bloom nutrients when you’re not in flower ? Plants in veg need nitrogen. How close are your lights ? Too close ?

why feed bloom nutes if you’re not in flower ? Vegging plants need nitrogen! Sounds like the soil is/was way too wet, your humidity is low, are you transferring to bigger pots? Are you root bound ? How close are your lights? Too close ?
They look a lot better I wasn’t using good enough nutes supposed to start with that “bloom” it’s just a very healthy light mix but I added the “grow big” and they came right back to life still some browning. I let them get really dry before re watering and heat is 77-82. Humidity is always on with two humidifiers but damn that exhaust pulls it out so fast. Exhaust only comes on when triggers by high temps ( generally 8 mins off 2 mins on) lights are 18 inches above on 16-8 cycle. Wasn’t planning on transplanting again they are already in 5 gallons. Not sure on numbers I need a soil reader
 

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They look a lot better I wasn’t using good enough nutes supposed to start with that “bloom” it’s just a very healthy light mix but I added the “grow big” and they came right back to life still some browning. I let them get really dry before re watering and heat is 77-82. Humidity is always on with two humidifiers but damn that exhaust pulls it out so fast. Exhaust only comes on when triggers by high temps ( generally 8 mins off 2 mins on) lights are 18 inches above on 16-8 cycle. Wasn’t planning on transplanting again they are already in 5 gallons. Not sure on numbers I need a soil reader
Hey guys just wondering some of your opinions. Plant are relatively healthy still got brown tips here and there but they dried out pretty good last night( drying up in like two days now) and got very droopy. Think once they get back healthy I should switch to flower? Or should I give it a week or two to stay healthy?

I have little faith it will produce to full potential( yield and quality) but I will take it as a learning curve and have better soil reading equipment next round so I know what I’m dealing with.
 

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Hey guys just wondering some of your opinions. Plant are relatively healthy still got brown tips here and there but they dried out pretty good last night( drying up in like two days now) and got very droopy. Think once they get back healthy I should switch to flower? Or should I give it a week or two to stay healthy?

I have little faith it will produce to full potential( yield and quality) but I will take it as a learning curve and have better soil reading equipment next round so I know what I’m dealing with.
That droop looks horrible. What point in the light schedule was the picture taken. Or was it before watering? If it was before bed or before daylight that makes sense cus they droop during dark. And you’ll get a good yield most likely. Are those new brown leaves or old?
 
That droop looks horrible. What point in the light schedule was the picture taken. Or was it before watering? If it was before bed or before daylight that makes sense cus they droop during dark. And you’ll get a good yield most likely. Are those new brown leaves or old?
Few hours into light cycle. They’ve dropped pretty bad before from being dry snapped right out of it. That pic was right before I got to watering. Browning is new and old probably within last couple weeks
 
Few hours into light cycle. They’ve dropped pretty bad before from being dry snapped right out of it. That pic was right before I got to watering. Browning is new and old probably within last couple weeks
You’re waiting far too long to water. Learn to water by weight. Temperature under LED really should be 80F minimum during lights on and about 10 degrees less during lights off. I suspect root issues at this point.
 
You’re waiting far too long to water. Learn to water by weight. Temperature under LED really should be 80F minimum during lights on and about 10 degrees less during lights off. I suspect root issues at this point.
They snapped right back up perky in an hour. I agree on watering I need to more often. I raised temps and humidity up and they dry up a lot faster. I’m about 75-80. I’m worried about root issues also. Think they will support a crop at all? Or slowly die off if I try to
 
They snapped right back up perky in an hour. I agree on watering I need to more often. I raised temps and humidity up and they dry up a lot faster. I’m about 75-80. I’m worried about root issues also. Think they will support a crop at all? Or slowly die off if I try to
Do you know what is meant by “water by weight”? If not I suggest finding out about it before flipping. Take a long thin object like a barbecue skewer and really pierce the hell out of the medium. Everywhere and especially under the plant. Do this between every watering or feeding. This aerates the medium and the roots.

Use an adequate volume of water. 20%-25% of container volume. If you are watering correctly they should take this amount slowly watered in with little to no runoff.
 
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