Plant Moisture Stress - Symptoms and Solutions

They are still exhibiting quite bad leaf burn, are growing slowly, and have yellow patches on their leaves. The soil is 25 degrees C. I am keeping the it constantly damp - should I be leaving them to dry out a bit more between waterings? Also, my lights are on 24 hours - I have had mixed opinions as to wether this is a good thing or not.... There are a number of varieties in the pics - some of them are doing much better than others. One set of them are getting fed, and one set are just getting watered, but no great difference is emerging between them.
I'm stumped - any light you could throw on my problem would be greatly appreciated. Thanks

HERBAL ADDICT said:

i put a thread on rollitup to help people,, i found all the info on another site,, people then winged at me for it, although it did help alot ov people on here

ive read the plant moisture stress article lots of times on all different sites a long time ago,,, so i was just wondering if any one winged at u for posting the plant moisture stress article on rollitup UB?

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What do you mean by "winged"? I've had plenty of my ditties plagarized without giving me due credit, if that's what you mean.

OneHit said:

UB, what do you mean, score the roots? Cut a little bit?

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Cut vertical slices 1/2" deep, about 4 around the rootball when you pop it out to upcan it.

Majestic Pagent said:

They are still exhibiting quite bad leaf burn, are growing slowly, and have yellow patches on their leaves. The soil is 25 degrees C. I am keeping the it constantly damp

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Looking at the pot size which is oversized IMO, that is probably not a good thing. Once you invite root rot due to anerobic conditions, it's usually impossible to restore proper plant health.

- should I be leaving them to dry out a bit more between waterings?

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Yeah, but not to the point of being bone dry.

Also, my lights are on 24 hours - I have had mixed opinions as to wether this is a good thing or not....

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Plants need a rest but it's all relative to the amount of photons collected by the leaves over a normal day. Plants like less photons over a longer period of time than being photon blasted over a shorter period of time. Same with plant food or any other cultural ditty.

You just need to find a balance.

Good luck,
UB

by winge i mean they complain at me if they have seen the article somewhere else.. but if it helps say 400 out ov 500 that read it then its worth me doing it,, but the other 100 that had read it b4 just complain about it..

dickheads man

ok, thanks for your work and your ditties UB. Looks like everyone is catching on to you as a source of advice! Could I just ask you one last question to clarify pls - do those plants look like they're suffering from moisture stress or some sort of nutrient deficiency/excess?

Majestic Pagent said:

ok, thanks for your work and your ditties UB. Looks like everyone is catching on to you as a source of advice! Could I just ask you one last question to clarify pls - do those plants look like they're suffering from moisture stress or some sort of nutrient deficiency/excess?

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You've got some curling and the start of necrosis going on with the lower leaves. Something is out of balance.

Good luck,
UB

hey uncle ben,, got plant problems and its something i havent had b4,,

some/quite a few of my leafs have cupped upwards and and even more have cupped downwards, like claws,,
and instead ov nice dark green leafs im starting to grow paler green leafs,

does this sound like ph problem?

i cant test the runoff as they dont need watering for a good few days yet,,

or if any one else here has had claw leaf and knows the cause i would really like some info,, and +++rep info,,

only thing i think could be a problem appart from ph is the humidity during dark houres is gettin to 89% rh,, is this really bad? what probs cud that cause,,

help help help lol....

HERBAL ADDICT said:

hey uncle ben,, got plant problems and its something i havent had b4,,

some/quite a few of my leafs have cupped upwards and and even more have cupped downwards, like claws,,
and instead ov nice dark green leafs im starting to grow paler green leafs,

does this sound like ph problem?

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No.

or if any one else here has had claw leaf and knows the cause i would really like some info,, and +++rep info,,

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Did you read page one of this thread?

yea red it,, only it mentions leaf cupping and margin rolling,nute burn+ph problems,

this isnt normal leaf cupping like ive seen before,, its like leafs collapsing into claws and its only 2 plants that are doing it

ive got no nute burn and im using full strength bio canna, ph runoff is 6.3 , ph going in is 6.8,, soil is canna terra pro+, ph 5.5/6.5 says on the bag

u see why im confused,

any way i done a full flush lastnight ,like 50 litres threw 4gal pots then give them fresh full strength nutes,, plants look better today,,

cud it ov been a build up of salts or stuff that caused the claws? ive seen toxic salt build ups cause faint patterns on leafs but never claw leafs

im only watering/feeding once a week.

I have a quick question! What will cause a plant(1.5wks) to just suddenly lay flat on the soil? Is that death? What will cause that?

UB, What do you think is wrong with this plant? Ive treated it the same as all my others, but this is the only one showing a problem. It doesnt look like nute burn to me...

What type of medium? SOIL

What brand and type of soil? FOX FARMS OCEAN FOREST

Indoors or outdoors?INDOOR

What strain? 2x white widow 2x querkle and 2x purple kush

How old are the plants? ROOTED CUTTINGS FROM MMJC

What type of lights and how many watts? 2X 48" 40W FLURO COOL WHITE AND DAYTIME

How far from the lights? 4 1/2"

What, how much and when was it fed? WATER THREE CAPS FULL SCARED TO DO ANYTHING ELSE

What is the medium/runoff pH and PPM if in hydro? N/A

What are the temps and humidity in the room? 78 DEGREES F HUMIDITY IS AT 70%

What size pots? 4 CLEAR CUPS IS ALL I HAD AND 2

Any bugs? Look real close. NO BUGS (BUT I ALSO HAVE NO MAGNAFING GLASS) NONE THAT I CAN SEE.

Any other pertinent info?
6 little girls were dropped of at my house today with no warning i was completely unprepared. i ripped the garage lights out of the celing (4ft flouros) and sourced a couple old sockets and reflectors from my old reptile tanks, my friend who is not able to keep up with the plants bought them from a mmjc here in cali he has only been feeding water and superthrive (i dont know why) but that was it when i got them the dirt was saturated. i jumped up as quick as i could go, and went to the local hydro store bought ff ocean forest soil. And i potted 2plants in only two pots i had. one plant had what looks like spiderwebs in the cup. when i transfered to pot the pot leaves are curling and yellowing please help me bring these girls back two health i dont know what to do to save them

my grow space is a 4' length x 4' Wide x 8' height
i have little money until next friday but i don't want these girls to die. Is there any thing i can do? i will have about 100-200 bucks for them if anybody can help me figure out what i need (besides a miracle) please help

OneHit said:

UB, What do you think is wrong with this plant? Ive treated it the same as all my others, but this is the only one showing a problem. It doesnt look like nute burn to me...

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Looks like a leafset is on its way out. May be bad, may not be. I'd pop it out of its pot to check out the health of the root system if I was you.

teflonkush, get those lights right down on the foliage, like 1" away or less. Keep fans gently blowing across the leaves. Opaque pots, not clear.

UB

Im pretty sure its not just a leaf thats going out, that leaf was near the top, and Ive never lost a fan leaf from one of the top colas. That and the plant looks sick. Heres additional pics

OneHit said:

Im pretty sure its not just a leaf thats going out, that leaf was near the top, and Ive never lost a fan leaf from one of the top colas. That and the plant looks sick. Heres additional pics

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Could be spider mites. Check the underside of the leaves with a loupe.

What's the NPK of food you're giving it, how much and how often?

Tio

I took a 60x microscope to it, didnt see any red dots like spidermites. My other plants right next to it has been looking fine, no damage on them that I can see. They have been like this and getting progressivly worse for the past 5 days or so. Didnt think it would get worse

As for the fertz, Im using foxfarms stuff. Big Blooms .01-.3-.7 and Tigerbloom 2-8-4. Ive been feeding tigerbloom every other feeding, and big bloom every feeding at half strength. I thoguht it could be nute burn, but it doesnt look like the ones in the paint guide thread

Uncle Ben have you heard of this product? I saw an ad for one today.
ICE BOX Water-Cooled Heat Exchanger

OneHit said:

I took a 60x microscope to it, didnt see any red dots like spidermites. My other plants right next to it has been looking fine, no damage on them that I can see. They have been like this and getting progressivly worse for the past 5 days or so. Didnt think it would get worse

As for the fertz, Im using foxfarms stuff. Big Blooms .01-.3-.7 and Tigerbloom 2-8-4. Ive been feeding tigerbloom every other feeding, and big bloom every feeding at half strength. I thoguht it could be nute burn, but it doesnt look like the ones in the paint guide thread

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There's your problem, not enough N. Most of these manufacturers all do the same thing, screw up the NPK values. Hell, most shouldn't be in this biz as they don't know what in the hell they're doing, or don't care.

Also, when you have yellowing at the top it's usually due to a lack of micros, UNLESS, you're giving the plant too much light and bleaching out the chlorophyll.

Not familiar with that product orzz. Be sure to read reviews on it before sinking your money. If it's sold thru Amazon.com, that's a great resource for customer reviews.

Good luck,
UB

ALright, I hit them with a dose of my veg nutes, its 6-4-4. Now it wouldnt turn the leaves back green right? Its permanatly damaged? But would just prevent it from happening in the future?

Its not light bleaching, Ive had it happen on some of my other plants before, so I know what that looks like. These tops arnt as close to the light as the ones that did get affected by light bleaching

Uncle Ben thanks for all the wisdom here. you have shinned light on a first time growers problems... mush respect.