Plant Moisture Stress - Symptoms and Solutions

[Jack in the Bud]

Uncle Ben,

I've re-read what you posted to start this thread but I'm still just stumped as to what may be causing my current problem. I'm hoping you might take the time to comment on what may be going on.

About half my current crop is effected with this. The other half seems to be doing fine. I've got them in some of that soil mix I made up some more of that you recommended to me last year. The plants are 75 days old (been under 12/12 for the last 10 days). They have had no additional nutrients of any kind and have only been watered with rain water or snow melt.

This problem started showing up 30 days or so a go. At first I thought may be I'd gotten to much blood or bone meal in the mix and it was a little to hot for them. I have given the effected plants several good flushings but it hasn't seemed to have had any positive effects.

Just the other day I up canned all my females from the 1 gallon pots they'd been in and all the plants seemed to have a good healthy root structure. In fact some of them were bordering on being root bound. Everything was a nice healthy white so I'm pretty sure I haven't been either under or over watering.

I've begun to think I've got some kind of nutrient deficency going on but can't figure out just which ones it might be. It seems the more I read up on the subject the more confused I get.

Any insight you may choose to give me will be greatly appreciated.

Jack

 

[DaveCoulier]

From that picture, I want to say heat stress. It looks like only the top growth is affected. Whats your lighting setup? Are you using a cool-tube? Have you tried moving the lights up any, or moving the affected plants to different parts of the tent such as the corner?

 

[Jack in the Bud]

From that picture, I want to say heat stress. It looks like only the top growth is affected. Whats your lighting setup? Are you using a cool-tube? Have you tried moving the lights up any, or moving the affected plants to different parts of the tent such as the corner?

Dave,

Thanks for the reply but I really don't think it's heat stress. They're under the same lighting set up I've been using for the past several grows and I've never had this happen before. The temps so far this grow have been in the 65 to 80 range. During past grows during the hot part of summer I've had it stay in the 80 to 90 range for extended periods and haven't seen this happen.

The space (a converted closet) has fresh air continually being pulled thru it by a bathroom "fart-fan" I've installed in the ceiling. And I've got two small 6" fans continually moving the plants around gently. My main light (a 400W MH) has it's own seperate in line duct fan cooling it.

The main differnce (as far as I can tell) between this grow and the last one is that this time I have used nothing but rain or snowmelt for watering.

Jack

 

[gazza255]

View attachment 962641View attachment 962642View attachment 962643View attachment 962644ok lets see if anyone knows whats up with my plants!ive been in flower now for 4 days and everywere were my flowers are forming my leafs are narrow and curling under like a claw quite bad,im guna put some pics up an see if you no what im doing wrong,,my temps are 26 degrees and moisture is fine..all other leafs are fine and the plants look real healthy its just the leafs what are growing were the buds are forming..thanks in advance

 

[DocBud]

View attachment 962641View attachment 962642View attachment 962643View attachment 962644ok lets see if anyone knows whats up with my plants!ive been in flower now for 4 days and everywere were my flowers are forming my leafs are narrow and curling under like a claw quite bad,im guna put some pics up an see if you no what im doing wrong,,my temps are 26 degrees and moisture is fine..all other leafs are fine and the plants look real healthy its just the leafs what are growing were the buds are forming..thanks in advance

it looks to me like they have been over fertilized. Back off on the nutes for a while until the new growth looks normal.

 

[gazza255]

it looks to me like they have been over fertilized. Back off on the nutes for a while until the new growth looks normal.

thanks for your input man,,by the way i dont have any nute burn like yellowing or anything its just the leafs curling right under.will the leafs come back as there ment to be or will they stay like they are...thanks man

 

[DaveCoulier]

thanks for your input man,,by the way i dont have any nute burn like yellowing or anything its just the leafs curling right under.will the leafs come back as there ment to be or will they stay like they are...thanks man

Excessive nutrients can manifest itself in more ways than just the tips of the leaves being burned. The claw is usually a sign of too much nutrients in the root zone. I had some sativas I grew last grow that had clawing near the top, and things became better when I cut back on their nutes.

 

[gazza255]

Excessive nutrients can manifest itself in more ways than just the tips of the leaves being burned. The claw is usually a sign of too much nutrients in the root zone. I had some sativas I grew last grow that had clawing near the top, and things became better when I cut back on their nutes.

thanks for your input mate,i have 4 plants of the same strain blue cheese,2 of the plants are in 10litre pots and the other 2 are in 25litre pots,,its the 2 plants in the 10litre pots im having trouble with,im feeding them 2litre per day using canna a+b nutes with some bud blood,the ones in the 25litre pots get 3litre a day but there healthy and nothing at all is wrong with them,im prety sure this leaf curling on my 2 plants stared when i went in to flower only 4days ago because before that they was fine.thanks man

 

[jjfoo]

Dave,

I had some plants in soil (first soil grow) that was amended before hand (sub's super soil). The plants ended up yellow and clawed. Did they maybe get too much nutes at one time to yellow but too much at another time to claw? I had the super soil on the bottom 1/4 of the pot and some good potting soil on top.

The plants that had the most clawing had really poor bud development.

 

[DaveCoulier]

Dave,

I had some plants in soil (first soil grow) that was amended before hand (sub's super soil). The plants ended up yellow and clawed. Did they maybe get too much nutes at one time to yellow but too much at another time to claw? I had the super soil on the bottom 1/4 of the pot and some good potting soil on top.

The plants that had the most clawing had really poor bud development.

You know, you got me thinking why one symptom of an excessive element will show, but not both at times, or one over the other. Just about every thread ive read about leaf clawing is excessive N, but we should be getting leaf scorch if that was true, but then I read that its *Urea, or urine that easily causes leaf scorch. Also, a lack of */**potassium will cause leaf scorch as well, so we could get leaf clawing without scorching if we had adequate potassium levels. Theres a lot of ways why symptoms will manifest in one way versus another. Im not at all learned enough to be able to say why X is happening over Y or how excessive elements affect other elements, but when I do see the leaves begin to claw, wilt, or become chlorotic, I can usually figure out what is likely to be the culprit. As long as you can recognize the whole of the symptoms and know they are caused by X, then I probably wouldn't worry about the detailed whos and whys.

Sources:
*http://www.puyallup.wsu.edu/~linda%20chalker-scott/horticultural%20myths_files/Myths/Leaf%20scorch.pdf
** http://pubs.caes.uga.edu/caespubs/pubcd/B1304/B1304.html

 

[plebean]

Q: If a clone is taken from a plant that has exhibited slowed growth or other stress, will that have any effect on the clone if said clone is grown properly?

 

[drherbalist]

Q: If a clone is taken from a plant that has exhibited slowed growth or other stress, will that have any effect on the clone if said clone is grown properly?

It is generally not advisable to take a clone from an unhealthy/unstable plant. However, I have had a plant that just got thrashed by a number of issues and so I stabilized it as best as I could, gave it a few days and then took the best cutting. The clone survived with no rooting hormone/gels/powders before planting it. Just a lot of TLC. I still have the Mother which looks like holy hell at this point...though I do see some signs of recovery. She has become more of a research plant at this point on which you can learn A LOT as well.

 

[jjfoo]

Q: If a clone is taken from a plant that has exhibited slowed growth or other stress, will that have any effect on the clone if said clone is grown properly?

It depends. If the problem is with the genetics then yes, if the problem is not genetic the clipping will have potential.

Read about phenotype.

 

[plebean]

You need to learn some basic plant culture by getting off the cannabis websites and going to an indoor gardening site...

He means like this: http://davesgarden.com/community/forums/t/796311/
or this: http://davesgarden.com/community/forums/t/719569/

For those of you who never wander away from the MJ forums, Tapla is UB's brotha from anotha motha. Google "Tapla gardening". The man, like UB, is a master gardener and is widely known on the Interweb as a gardening guru (also like UB).

There are those who say growing good weed is an art. Ahhh, not really. Growing weed into the shape of a giraffe? Maybe. Learn the science and try and adjust to the fact that you're dealing with plant time, not human time. People think they can tinker with plants like they tinker with cars. EVERYONE finds out sooner or later that it doesn't work that way. Think about all the ways we talk about our plants: BOOST, PUMP, HIT'EM, JUICE, KICK, INJECT, FLUSH, SUPE, JUMPSTART...and so on and so forth.

This is a uniquely American phenomenon, to treat any and all additive as discreet, distilled, concentrated..............PILL!! Vitamins, performance supplements, food, car tuning, pharmaceuticals, hair restoration, fake boobs, fake tans, third-world babies. Sorry, but despite what AN, FF, GH, Canna, Oprah, Big Pharm, and everyone else tells you, there's no single purchase you can make that is going to give you killer cannabis or a better relationship with your wife or more respect from your peers.

Stay educated, stay suspicious, and consider the source. Or else you'll lose the one weapon you have, your mind. Remember that when UB or Dave tells you to go do some research, because if you're just looking for some EASYBIGDICK pill, I hear Cialis is giving out free samples.

 

[DaveCoulier]

He means like this: http://davesgarden.com/community/forums/t/796311/
or this: http://davesgarden.com/community/forums/t/719569/

For those of you who never wander away from the MJ forums, Tapla is UB's brotha from anotha motha. Google "Tapla gardening". The man, like UB, is a master gardener and is widely known on the Interweb as a gardening guru (also like UB).

There are those who say growing good weed is an art. Ahhh, not really. Growing weed into the shape of a giraffe? Maybe. Learn the science and try and adjust to the fact that you're dealing with plant time, not human time. People think they can tinker with plants like they tinker with cars. EVERYONE finds out sooner or later that it doesn't work that way. Think about all the ways we talk about our plants: BOOST, PUMP, HIT'EM, JUICE, KICK, INJECT, FLUSH, SUPE, JUMPSTART...and so on and so forth.

This is a uniquely American phenomenon, to treat any and all additive as discreet, distilled, concentrated..............PILL!! Vitamins, performance supplements, food, car tuning, pharmaceuticals, hair restoration, fake boobs, fake tans, third-world babies. Sorry, but despite what AN, FF, GH, Canna, Oprah, Big Pharm, and everyone else tells you, there's no single purchase you can make that is going to give you killer cannabis or a better relationship with your wife or more respect from your peers.

Stay educated, stay suspicious, and consider the source. Or else you'll lose the one weapon you have, your mind. Remember that when UB or Dave tells you to go do some research, because if you're just looking for some EASYBIGDICK pill, I hear Cialis is giving out free samples.

I never knew Tapla posted outside of gardenweb's forum. Ill read those links you provided later. I love reading Taplas posts. Everyone here would learn alot by reading some of his stuff. His knowledge isn't "tainted" by the marijuana myths and urban legends. Just true, no-nonsense knowledge that will improve anybodies gardens here.

 

[plebean]

I never knew Tapla posted outside of gardenweb's forum.

Yeah, he's about as prolific as UB is. He was accidentally banned from GW for a couple of weeks and you should have seen the outcry from all the members of GW asking for his return. We should all be grateful to have such tremendous resources as UB/Tapla at our disposal, all for free too I might add! Dave, if you're a fan of Tapla/Al, then I'm sure you've read those posts before. The really important stuff gets reissued/reiterated quite a bit. I realized that I should have titled them for easier forum search. So here they are again, this time under GW and titled:

Container Soils & Water Retention
Fertilizer Program for Containerized Plants

 

[DaveCoulier]

Yeah, he's about as prolific as UB is. He was accidentally banned from GW for a couple of weeks and you should have seen the outcry from all the members of GW asking for his return. We should all be grateful to have such tremendous resources as UB/Tapla at our disposal, all for free too I might add! Dave, if you're a fan of Tapla/Al, then I'm sure you've read those posts before. The really important stuff gets reissued/reiterated quite a bit. I realized that I should have titled them for easier forum search. So here they are again, this time under GW and titled:

Container Soils & Water Retention
Fertilizer Program for Containerized Plants

Ive read most of what you've supplied, but some of it is new reading material, but its also good to go back and reread the old stuff sometimes to refresh our memories.

 

[riptidefever]

New grower, closet grow in soil 26 seedlings, still have all 26 5 1/2 weeks later, 480 watts, woke up this morning and my smallest plant was curling at the top, the leaves, any advice would be great, love my new hobbie !

 

[drherbalist]

New grower, closet grow in soil 26 seedlings, still have all 26 5 1/2 weeks later, 480 watts, woke up this morning and my smallest plant was curling at the top, the leaves, any advice would be great, love my new hobbie !

What kind of light setup are you using? And how close do you keep your plants to the lights? Also, what kind of soil are you using?

 

[sharl]

i have some questions about a ebb and flo set up and nutes. im stressin and was wondering if anyone was around to help me out. thanks so much