Plant Moisture Stress - Symptoms and Solutions

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blackxs

Member
C02 can definitely help in high temperature conditions, but generally, growth will slow above 83/85.

If at all possible, lower your temps to about 80 and see if your plants dont enjoy it more. I bet they will. And while C02 may help mitigate any ill effects of temperature, it can be a tradeoff because you have to turn ventilation off to run it which lets things get hotter. Unless your running a closed setup. In which case I think no-C02 running 10 degrees cooler would be better. Just IMO, but what do I know - I only have so few posts ;)
 
Dubbz0r

Dubbz0r

Well-Known Member
blackxs said:
C02 can definitely help in high temperature conditions, but generally, growth will slow above 83/85.

If at all possible, lower your temps to about 80 and see if your plants dont enjoy it more. I bet they will. And while C02 may help mitigate any ill effects of temperature, it can be a tradeoff because you have to turn ventilation off to run it which lets things get hotter. Unless your running a closed setup. In which case I think no-C02 running 10 degrees cooler would be better. Just IMO, but what do I know - I only have so few posts ;)
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haha I didn't say anything about your post count dude! My temps are high, I know that much. I would definitely like them lower but it's what I have to deal with for now. We got hammered with that heat wave a week or so ago and I haven't been able to bring the heat back down below 88F. Basically I stopped trying to fight it. My plants will be moving to a new place within the next week or two where it will keep a steady 83F, so until then they will have to be fine. My setup is closed but the fan cooling my hoods is outside of the room. Without central air in this house it's pretty tough to keep the basement cool with the ass end of my a/c unit heating the entire thing. So the air used to cool my hoods isn't very cool at all. That might be just as warm as the air in the room itself. It sucks but...it is what it is, for now...
 
doublegrow7

doublegrow7

Member
Question: im 7 weeks into flowering, 1000 watt light, og, around 6.5 ft. fox farm nutes, all of my plants are looking super but two days ago one had her leaves droop dramaticly. just one. all the leaves seem to be dieing flowers are much smaller then her sisters and the pistols are turning orange. shes not taking up water like she use to. they all got the same treatment, so wtf went wrong? can she be saved.
 
lbezphil2005

lbezphil2005

Well-Known Member
Dubbz0r said:
If I don't give them water every day, my plants wilt. As soon as I water them, they perk back up. They're in 5 gal warrior pots and are extremely thirsty girls (except the lemon skunk). Week 4 of flower just started yesterday. The temp in their room has gone up this week thanks to the major heatwave that hit us. At some point it was up to 93F. I run a 70 pint dehumidifier during lights off along with 4 box fans and an a/c unit. rH is always between 40-47%. Anyways, I'm coming to the conclusion that the lemon skunk ladies were not over watered but were suffering from heat stress. Two 1000w hps were running approx. 12" from canopy. I raised them up to 16" recently. The flush and nute feed seemed to help the LS for the most part. Now they're just trying to catch up to their roommates.
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the reason they wilt is because they are already in stress from overwatering, the roots arent developed enought for the canopy it's supporting. It's okay, I don't know anything, listen to @#$%^&, he's the expert.
 
lbezphil2005

lbezphil2005

Well-Known Member
blackxs said:
There is no "correct" way to water. Some plants are thirsty, some hardly drink. Your doing it right, feed to your plant's needs not to what some book or internet strange says. 93 is definitely a little too hot. Growth slows above about 83F, stops at about 87-90, damage above 90.

I think you should have put the camera in the same place each picture.
I also think putting reflective material directly under and touching the leaves is a ridiculously bad idea.
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I hate to tell you, but the correct way to water is to let your pots dry out, then water. duh. Also, speaking of internet strange...... And what about outside grows in areas where temps get up to 100? I've got plants outside right now that are over 6 ft tall, been growing all thru this hot spell. Hmmmmmmm......

Some of us have went thru overwatering experiences thru our own learning processes, thats why we give advice, because we've done the same things or had the same problems. I think your roots might be staying too hot from the roof - when you say warrior pots, are they like smart pots, supposed to help keep the roots cooler? And are they directly on the roofing or did you put them on a board, something like that?
 
Dubbz0r

Dubbz0r

Well-Known Member
I'm not fighting the heat anymore. What I'm fighting now is downward canoeing of my fan leaves, almost to the top of my kush plants. Here are a few pictures:

2011-07-31_02-00-19_484.jpg2011-07-31_01-59-40_140.jpg

My plants are flowering great but what the hell is the cause of this? I'm torn between flushing or feeding... I got advice from a friend trying to help but I need more opinions before I make my move. My girls need to be watered or fed today and I need suggestions please.
 
Biologically Incorrect

Biologically Incorrect

Active Member
How far along are the, have you checked the trichomes? Yellowing is normal during the end, but the bottom of the leaf almost looks like nute burn.

Peace out

Dubbz0r said:
I'm not fighting the heat anymore. What I'm fighting now is downward canoeing of my fan leaves, almost to the top of my kush plants. Here are a few pictures:

View attachment 1714986View attachment 1714987

My plants are flowering great but what the hell is the cause of this? I'm torn between flushing or feeding... I got advice from a friend trying to help but I need more opinions before I make my move. My girls need to be watered or fed today and I need suggestions please.
Click to expand...
 
Dubbz0r

Dubbz0r

Well-Known Member
I'm only on day 34 of flower so I doubt they're almost ready. There's still a few weeks to go. The plants have been improving a lot in the last few days. Current pics are in my sig
 
I

Irieking

Active Member
hello, i am need of confirmation that indeed; overwatering has occurred in my plants...??? i am not 100% sure please help??
PIC_0068.jpgPIC_0071.jpg
 
Holy Smokes

Holy Smokes

Active Member
Great article. I would also add the pH thingy. I've read that a lot of times, people forget about keeping the pH at a steady level. I've been keeping it at 6.5 because everyone gives me a different number. -- Anyway, I mix in the organic ferts and then I check the pH till I get it at 6.5. I recently started watering it with ferts until it runs out at the bottom at 6.5 (I catch the water from the holes at the bottom of the plastic pot.)
 
Uncle Ben

Uncle Ben

Well-Known Member
I wrote a ditty on the pH myth. "Popular thought" is not always correct, especially in pot forums.

Cannabis is quite pH tolerant.

UB
 
Kingrow1

Kingrow1

Well-Known Member
Uncle Ben said:
I wrote a ditty on the pH myth. "Popular thought" is not always correct, especially in pot forums.

Cannabis is quite pH tolerant.

UB
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Calcium deficiency seems to get mixed up with pH a lot, pH is also a myth to me, plants are quite tollerant of pH and reading runoff is never as accurate for pH as you think. Peace UB
 
Holy Smokes

Holy Smokes

Active Member
Thanks, fellas. I'll test this on my next grow, but since I have few babies, will continue their pH pablum and diaper changes. I do appreciate you taking the time to share this with me.
 
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bertcanada

Member
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about a month ago it was way to hot and it has never recovered and seems to have slowly been getting worse from the bottom up, is my light on the back side too close? i know its only a T5 but it seems to be getting worse on the side of that light , what am i too cut off to recover? i have been taking off alot of dead stuff all wilted and crap. I dono what to do before it all dies and ims screwed. I water every 3 days, every 2nd I put the plantriods and super b and have been spraying every 2nd day with veg boom. its a mom, indoors, in dirt, it was soooooo healthy untill the 1 day
 
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