Lies our fathers told us humidity

[LexLuthor]

Basic botany hmmmmmm... Lex correct me if I'm wrong but are you stating that one specific VPD is ideal for all cannabis? IF you are, hahahaha that is a good one. Let me be specific I don't think there is one specific VPD that is ideal for all cannabis. And one more thing. I know for a f'n fact that not all cannabis performs BETTER with a higher RH peace and you know the rest I'm sure!

When I say ideal or optimal RH, I am NOT talking about one specific number, I am talking about a RANGE. For example, optimal temps would be AROUND 75 F without co2. I thought everybody would assume that on there own, I guess some people just need special attention.

And yes, cannabis does have a range of vpd that is ideal, just like tomatoes, or bell peppers, or whatever plant you wanna grow. The only valid argument you have is sativas are able to survive easier in higher RH conditions compared to indica strains, but nowadays with every strain being a hybrid (regardless of what the breeder calls it) there really isn't a big difference.

 

[caveman4.20]

Lol

 

[caveman4.20]

GTFOOH not a big difference well let me put it this way I used to strive for an incubator ideal environment sealed c02 brain the whole nine...now I grow with minimal input money and electrical wise and popp a ton of seeds and I find the phenos that thrive vigorously without pampering....

 

[Jalisco Kid]

GTFOOH not a big difference well let me put it this way I used to strive for an incubator ideal environment sealed c02 brain the whole nine...now I grow with minimal input money and electrical wise and popp a ton of seeds and I find the phenos that thrive vigorously without pampering....

Just like with women but sometimes you can run into a high maintenance keeper. It takes 4 weeks plus for my bp to root,pain in the ass but was worth it for over 8 years.

 

[DesiretheFire]

@Jalisco Kid Where is the best place to get Potassium Silicate? and what dilution rates work best for you? if you dont mind me asking..

 

[DesiretheFire]

Oh and ive been following the VPD for the last week or so, growth is real fast!

 

[midwestdensies]

you ever been in a room full of healthy plants and see for yourself what actually happens when temps rise above 80f? i ask because you keep regurgitating the same 70% hum info or plants wont use co2 as if you have nothing left to learn lol.i searched a bit on your threads and all i could find was a fluffy nug that is def NOT masterkush and some tiny plants in a long thread about turning it inside out?are you saying plants grown in 20% rh dont use co2?is there not one grower here at the farm growing dank in the desert or very dry conditions of arizona?pot plants have a protective resin on them unlike lettuce or tomatoes that helps keep the leaves from drying out in the hot sun,the dryer the air the more resin these plants create.we want as much resin,oils,and thc as possible on those leaves and buds right?nevermind that last question,i like the pics do the talking,if you want dank smoke lower your rh,if you want big fluffy mids for profit by all means run at 70%rh and blow up the co2:wtf:

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those ^^^^^^^^^^ are aliendawg @ 54 days 78f and 30% rh all day every day lol.

and heres what my masterkush looks like in the same room
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oh and im pretty happy with my yields cause oil weighs more than leaf,imo of course;)

you arent teaching me anything home skillet in fact you should pay attention>>>vpd chart<< showing optimal temps which I rock 80-85 in veg with 65-80% rh until week 4 then its 60%. My plants really love it and I dont need to show pics on this log to prove. Get over your self

 

[midwestdensies]

See? This is why I say it's as much an art as anything else, even given the science we can put into the art. Growing is an art, that's my opinion and I'm stickin' to it.

Ive never found or seen anything more artisanal than growing and how everything effects one another from nutes, bulbs, medium and skill

 

[midwestdensies]

lots of good debate and opinions good shit

growstick has shown some real nice picture of some bomb ass floweirng plants that he says are done in forty percent or even lower humidity and they looking real nice.... so what is the deal.... are us people that think we need more humidity and looking at vpd charts just high on girl scout cookies? Is it possible that the vpd humidity is really strain specific? possible that some cannabis needs really high humidity while others does fine in a much larger range?

the poing is to grow proper cannabis hence the vpd chart for optimal cannabis. Yall can debate over mediocre cannabis but you know what debate im in

 

[midwestdensies]

good times, bad times. vpd chart is optimal, dehumidifiers exist of all shapes and sizes. Sealed rooms help tons with pathogens and etc.. Not sure what there is to debate about. I have 10 strains growing as optimal as ive ever seen not one fucking issue but finding time to trim more than used to that has frost of unbelievable proportions.

 

[LexLuthor]

GTFOOH not a big difference well let me put it this way I used to strive for an incubator ideal environment sealed c02 brain the whole nine...now I grow with minimal input money and electrical wise and popp a ton of seeds and I find the phenos that thrive vigorously without pampering....

Just because a plant is thriving better then others, doesn't mean its always attributed to the environment being perfect for that strain or pheno. It could be things like the EC of nutrients or the pheno itself. I've never seen plants do bad unless it was my fault or shitty genetics. And when I said there isn't a big difference, I didn't mean it has to be a small difference, just not a big one i.e. this strain does best in 30% RH and another one does best at 75% RH. I think all strains do better with RH over 50%.

Like midwest said, I'm not sure what there is to debate about. Grow on partner.

 

[caveman4.20]

Ya grow on indeed ! I love me some 50 rh and my plants do also

 

[Jalisco Kid]

@Jalisco Kid Where is the best place to get Potassium Silicate? and what dilution rates work best for you? if you dont mind me asking..

I bought mine from Grow More. they have two kinds one for suckers to be sold to hydro stores and one for agr. I buy it by the case as a distributor. I would be embarrassed to tell you how cheap.I do not have any info with me here to say what the ratio is but I mix some into ro water till I get the pH around 8.1, it is not much.Usually during the same week I use cal 25 followed by some of GM's 26% kelp. JK

Oh and ive been following the VPD for the last week or so, growth is real fast!

 

[DesiretheFire]

Good to know, thanks!

 

[sixstring]

good times, bad times. vpd chart is optimal, dehumidifiers exist of all shapes and sizes. Sealed rooms help tons with pathogens and etc.. Not sure what there is to debate about. I have 10 strains growing as optimal as ive ever seen not one fucking issue but finding time to trim more than used to that has frost of unbelievable proportions.

that "get over yourself" comment hurt lol.not sure what there is to debate about? i was debating the high humidity vs low humidity,but i guess its over because you clearly "proved" without any doubt that your way is the best?naw man,theres a bunch of ways to grow this plant,low humidity just seems to fit my style best.and im running twice as many strains as you and twice as many lights so i think i know what works for me;) i peeped your build,its nice for sure.wish there was more pics without all the hps washout but i get the jist.the reason i say low humidity works best for me is because i run both ways.during the winter i use the cold dry air of michigan to cool my room and during the summer i close the light loops and run a/c and co2 so my rh naturally gets up in the 60% range from all the co2.i prefer my winter weed over the pumped up summer stuff.the weights are very similar but theres alot more resin and smells from the winter buds.imo of course:banghead:

 

[souphead]

Botrytis makes me cry. :(

That said, I think a lot of strains like a pretty humid environment.

 

[The Krinken]

depends on the strain...some really thrive at about 70% + RH for sure....but 70% is fine anyway....if it hits 80% theni start working on bringing it down...if it went down to 25% id work on bringing it up...

i sound like a genius dont i....lol

 

[DesiretheFire]

Yeah there's a huge difference between 70 and 80% humidity. 70% dosent feel all that humid but 80% sure does.

Im on week 3 and Ive been running 65-70% during the day and 55% at night. I plan on going a little lower late in flower. But plants just overall look great! You can just tell the plants like the higher humidity.

Every one should at least try the higher humidity and compare results. If you have good prevention and air movement i dont see much much that can go wrong!

 

[purpleberry]

Being advised to run low humidity comes from growers who had problems with PM and didnt know how to solve it, and needed to mask there problem. Theres a difference between keeping plants that are already infected with PM from breaking out with spores and keeping PM from infecting your plants when some spores blow in your room from outside.
Once you have plants that are infected and are very susceptible to it like purple strains you need to either cure the plant with systemic fungicide Or start your own seeds. Once you get rid of it Its very easy to keep the plants from getting it with tons of air flow in the room, In a sealed room this meanns wall fans every where. Botrytis is the same, Its the only mold ive seen for years and it only happens to large purple buds in dead spots where there isnt a ton of air flow.
Running high humdity by it self isnt going to nessesarily give you better results just like adding co2 isnt going to. Running high humdity will pay off alot better when its done at the right temp, and you add co2. You have to look at your room like its a machine, If 1 part on a machine is broke the rest of the machine isnt going to run right.

 

[woodsmaneh]

We are growing a weed and if you have a lawn you know the weeds are the last to die and they grow the big and healthy in just about any conditions, most times. That's what we have in our gardens so they will grow great in all kinds of conditions, good and bad, and I would expect people to have nice bud shots of growing in 30% and so on but there are some forces at work here that make some of use think 30% is great and others that think 70% is great. People no mater what you think I always go with proven science over what old red told my dad back in the day, we all know growers like that. Any how what you need to understand is the effect that temp/rh have on your plants ability to produce energy to grow and fruit.

If your happy with your results great but I'm just about never happy so what you need to know is your plants have pores on the leaves that are called stomata, kind of like your armpits and they open and close depending on the temp/rh, it's like a gas peddle when things are right they are wide open but when they are not they close uu and that by friend limits the potential in your plants. What you need to do is learn about VPD, Vapor Pressure Deflect check this out

http://ohioline.osu.edu/aex-fact/0804.html