Plant Moisture Stress - Symptoms and Solutions

Danielsgb said:

What is the half life for it? It's based on chrysanthemum so why are you so adamant about not using it.
Apple Cider Vinegar works fine for a pH down for me, so why is it also bad?
Daniels

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i just read some interesting info on PYRETHRUMS. there's a member of a species of chrysanthumum that produces pyrethroids which are natural insecticides
and i guess i was wrong about pyrethrum. i'm just squeemish bout insecticides period. idk what u mean by half life.
yeah pyrethrums actually breakdown in the soil. and they arent harmful to humans except in high doses.
idk...mb i was thinking permithrin....it's all a blurr.
vinegar into soil makes me uneasy. wouldn't it kill off mycorrhiza? The fungus that benefits life in soil and uptake of additional nutes by plants?
ps...what ph u keep ur grow medium at?

I don't think there is Anything to be that worried about.with insecticides. If you follow the label, it's OK. I've used Malathion & it's a strong one. All that stuff has to be tested, and it's safe for vegetables to eat. Half life is how long it lasts. Most stuff is safe two weeks after it's application. I'm being very general, but labels tell you a lot.
On Apple Cider Vinegar only 1 tsp. per gallon drops my pH by about 1 pH, which is down to 6.2 so it works for leeching the soil. It doesn't kill the good bacteria. Remember, there are millions in a 1 gal. pot of soil, & they are tough and diversified.
My soil has a pH of 6.7 but other than the original lab test (thx UB) I never test again. People blame too much on pH issues. It is harder to change a soil's pH than you would believe. I mean a vegetable garden, like 50' x 100'. Soil has an amazing ability to return to it's original pH.
Daniels

Danielsgb said:

I don't think there is Anything to be that worried about.with insecticides. If you follow the label, it's OK. I've used Malathion & it's a strong one. All that stuff has to be tested, and it's safe for vegetables to eat. Half life is how long it lasts. Most stuff is safe two weeks after it's application. I'm being very general, but labels tell you a lot.
On Apple Cider Vinegar only 1 tsp. per gallon drops my pH by about 1 pH, which is down to 6.2 so it works for leeching the soil. It doesn't kill the good bacteria. Remember, there are millions in a 1 gal. pot of soil, & they are tough and diversified.
My soil has a pH of 6.7 but other than the original lab test (thx UB) I never test again. People blame too much on pH issues. It is harder to change a soil's pH than you would believe. I mean a vegetable garden, like 50' x 100'. Soil has an amazing ability to return to it's original pH.
Daniels

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Yeah I imagine in a vegetable garden of that size it probably would be.
Ok so 1 tsp /gal for apple cider vinegar reduces by one full point....check
Ph 6.5ish.....check
I've read more insecticide labels than I care to remember.....hmmmmm I do have a few questions?
Do you spray, drench and do you only apply during veg stage or any time?
And what do you spray for? Mites? Ever tried safer soaps?
50 x 100 makes my back hurt just thinking about it.

dannyboy602 said:

Yeah I imagine in a vegetable garden of that size it probably would be.
Ok so 1 tsp /gal for apple cider vinegar reduces by one full point....check
Ph 6.5ish.....check
I've read more insecticide labels than I care to remember.....hmmmmm I do have a few questions?
Do you spray, drench and do you only apply during veg stage or any time?
And what do you spray for? Mites? Ever tried safer soaps?
50 x 100 makes my back hurt just thinking about it.

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My veggie garden isn't that big, but if you count all the flower beds it's somewhere in that range. My point was soil returns & the good bacteria is hardy.
With the apple cider vinegar, that is my local tap water so yours may be different. Just know it is an acceptable pH down.
I have used the Dr. Doom Knock Out, & formaticide for spider mites, & I mist with Neem Oil water often too. I've sprayed 3 weeks before harvest before, just try to avoid it. I've used Malathion in the vegetable garden many times, usually sprayed, but I have used a drench too. Mites & powdery mildew have been my only Cannabis pest/disease problems so far.
Daniels

Sounds like ur only problem is mites. Shame. I can only hope they don't make it into my basement...lol thanks

Danielsgb said:

My veggie garden isn't that big, but if you count all the flower beds it's somewhere in that range. My point was soil returns & the good bacteria is hardy.
With the apple cider vinegar, that is my local tap water so yours may be different. Just know it is an acceptable pH down.
I have used the Dr. Doom Knock Out, & formaticide for spider mites, & I mist with Neem Oil water often too. I've sprayed 3 weeks before harvest before, just try to avoid it. I've used Malathion in the vegetable garden many times, usually sprayed, but I have used a drench too. Mites & powdery mildew have been my only Cannabis pest/disease problems so far.
Daniels

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thank you very much for this!! I found what was wrong within 5 minutes of reading your post. thank you for help saving my young ones!!

Never to much light. Looks like too much water!

Hey Uncle bean-Great thread! Bookmarked for sure. Got a lot of catching up to do. I tried sending you a PM but your box is full

Dwc /4wks flower ..Ph 6.0 ...ec.19 ..26.c
Im not sure whats wrong with this one ,i noticed it 2 days ago any ideas,,

they dont look they they have any damage bud...nice grow by the way but by the looks of em"wet leafs" they might be over watered possibly from spraying to often or watering or both let them dry up a bit and we can see how they look then...thats just my guess..have to watch closely tho keep us posted on here

also through out the day the leafs will raise up and lay down up down up down and so on i see parts of the plant A-OK like the one towards the left ..there not necessarily curling from what im seeing...no curling of seraded edges of the fan blades...like I said lets let em use that water up a bit and see what she does...i tend to do this to my plants once in a while not a bad thing really just dont do it all the time if you do then ull tend to have less resin build up on the leafs which you dont want

killeroxx said:

they dont look they they have any damage bud...nice grow by the way but by the looks of em"wet leafs" they might be over watered possibly from spraying to often or watering or both let them dry up a bit and we can see how they look then...thats just my guess..have to watch closely tho keep us posted on here

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killeroxx said:

also through out the day the leafs will raise up and lay down up down up down and so on i see parts of the plant A-OK like the one towards the left ..there not necessarily curling from what im seeing...no curling of seraded edges of the fan blades...like I said lets let em use that water up a bit and see what she does...i tend to do this to my plants once in a while not a bad thing really just dont do it all the time if you do then ull tend to have less resin build up on the leafs which you dont want

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Killer thanks for the reply.. i think your right on the overwatering , ive been foliar feeding them a little bit to much recently.\i forget even hydro can be overwater!! Going to stop the spraying for now.

DGD..

ya just to see if its not that we will figure it out then only time will tell

ends of leaf twisting around? have this showing on a clone. only on 2 leaves.
clones are 3 weeks cut under a CMH 400w bult at 4ft. one clone was 3 to 5 days cut older than the 2nd. Pics are just a few hrs ago.
Happy Frog and just water for the first 2 weeks. 5 days ago they got a water with 1/4 strenth DynaGro Foiliage pro, and 1/4 tesp Pro Tekt in a gallon. both plants shared about a qt that water, they LOOK like they have started to untwist a big.
straight water 2 days ago, and will get another fed water here in a bit.


using my well water. phs around 7.5 out of the tap. not sure on its ppm and breakdown.

So what would cause this type of leaf twist? only 2 of the leaves on the larger girl have it severly, and both have wavy leaves, but only a few of the oldest leaves exhibit this charicteristic. both came from the same mom, who also has this triat/issue. could this be a genetics thing, therefor not really changeable, thus nothing to worry about? im just wondering if what is causing the twist, may also limit growth, size, and/or strength?

Read ALOT of your threads over the last 3 months UB. much respect for your Degree in Hard Knocks. Im in my mid 40s, and still at school, though i think if we are breathing, we should be atleast still trying to learn.

any info/help/recommendations on my "twist, twist" is greatly appreciated. RH is about 25 to 28%, room is 68ish at dark and 78 to 80ish on light. 18/6 lighting.


check mid leaf on left at tip. you can see its actually flipped 180* around.
this is the older girl by 4ish days cut.



here is the younger girl (3 weeks cut tonight about right now at 8:30pm)
you can see the same area that the leaf is twisting over to reveal the underside ever so slightly.


suggestions?
and ty for any i get.

today my plants look like they need water or something because the plants are drooping over, the tops just hang down. I have an indoor grow. could it be they got to cold or to hot? I want to change the light to flower but not if the plants are stressed out. Any help would help.

Hey guys. I'm a noob lol I have some LR2 seeds and germinated them fine. They sprouted up and I added another light and went to work and when I came home my 5 little sprouts were pissed off. I was too much heat. The extra light was hotter than I expected and dried up the plants and a lot of the soil. I am doing what I can but the poor little sprouts are in bad shape. 2 out of 5 are a dullish green, 1 looks a terrible yellow and the other 2 are still green. The plants are "remoistured" but I am not sure if they will recover. Has this happened to anyone else? Any advice? I have 4 more LR2 seeds and I will germinate them if these poor little sprouts dont make it. I have also read the article on too much heat (I pasted it at the bottom of this article) and my sprouts have the same symptoms as described in the article but I am still in need of advice, or support! Lol I'm pretty bummed over all this cause its my first time.

"High Heat - the plant is losing water via it’s leaves faster than what can be replaced by the root system. The leaf responds by leaf margin cupping or rolling (up or down) in order to conserve moisture. A good example is reflected by the appearance of broad-bladed turf grass on a hot summer day, high noon, with low soil moisture levels - the leaf blade will roll in and the grass will take on a dull, greyish-green appearance. Upon sunrise when moisture levels have returned to normal, the leaf blade will be flat. Lower the heat and concentrate on developing a large, robust root system by practicing sound plant culture. An efficient and effective root system will go a long way to prevent heat induced leaf dessication and leaf margin curling by supplying sufficient moisture for good plant health. One short episode of high heat is enough to permanently destroy leaf tissue and cause a general decline in the leaves affected, which often occurs to leaves found at the top of the plant located near HID lamps. The damaged leaf (usually) does not recover, no matter what you do. Bummer in the summer. One can only look to new growth for indications that the problem has been corrected."

you said too much light can actually be harmful for the plants if i am growing indoors and have a room going 24hours a day of light for veg is that bad?

I'm far from an expert but I know that most strains need 18 hours on and 6 off for vegitation and 12/12 for flowering. The seeds that I had were Lowryder 2 seeds which were autoflowering and didnt mind the 24 hour light but probably wanted 20/4 light. Too much light can cause heat which can kill sprouts apparently. My fault. Hope this helps!

light cycles 24 vs 18/6 is a very often heated debate. It really goes either way depending on preference/cost

the 24 hour light guys claim (and this is backed by some good science) that since cannabis is a type of plant (cant remember class) that does not need a dark period to photosynthesize. more light = more growth. More light also means less stretch

the 18 hour guys say stored energy in the roots translates to explosive growth when lights go out. but most recognize that this is due to stretching for light when lights are out. 18 hour light is also less electricity, and less wear on your lights.

the one thing i can say is that 24 hour light = tight bushy plant, 18hr light= stretching plant, to most it looks normal not talking huge lanky stretch.

have one that has three leaves, one that is much smaller than others and curling in.