Heat Stress?

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reeferman420

reeferman420

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So i have 5 plants been havin some problems with nute burn on one but i got a new light this week a 1000w hps and it seems one plant has badly burned top leaves. im not thinking it is not the nute burn problem because i have two plants in the container and the other one looks great but its aldo about 8 inches shorter. you can see the severely twisting leaves near the top of thus pic its hard.to see the yellow with hps on. any ideas? what am i doing wrong ive been waitung til soil is bone dry to water is that too long?
 
Heat stress
DOGBUDS

DOGBUDS

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Hey Reef,
Sorry to hear about your plant(s), I think a little more info on your set-up will help some of the experienced famers here to better diagnose and potentially fix your problem (i.e., light distances from canopy, room/tent temps/humidity, ventilation, fans, etc..). In my experience when the damage is only towards the top of your plant, its probably heat stress (especially considering the fact that you just introduced a 1000watt heater to your grow area). Plants that have water/moisture readily available can sometimes counter the effects of the added heat by simply expelling more moisture onto their leaves which assists in cooling of the plant. It would be my guess that your issue is a combination of light too close(heat) and not enough moisture(cool) to help the plant deal with the changes you made as well as some ventilation/fan issues.
Things to try: -Put a little more distance between your light and canopy
-Water a little more to counter the new heat you've added to your grow..Also, "completely" drying out your soil
IMO is not good to do, soil should have some kind of moisture to it at all times...
- Good ventilation, especially fans blowing in-between your canopy and light source(s).
Hope this helps a little..DB
 
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reeferman420

reeferman420

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i just cut the leaves off for a bettwr view they are dying anyways
 
IMG 20160218 145318
reeferman420

reeferman420

190
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so im running the light vertical it was bout 8 inches from that plant bout 12 from yhe others. its a 1000w eye hortilux with a umbrella reflector before this i was running mistly smaller metal halides and a couple smallhps wgich created a lot of heat. i have to fans that blow between the canopy abd light
 
DOGBUDS

DOGBUDS

76
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I would bet my current grow that its heat stress as well as some nute issues. Unless you have a significant AC unit to keep that vertical light in check, you're going to continue to run into these problems... Do you have any type of temperature gun so that you could tell us what your canopy temps are? DB
 
reeferman420

reeferman420

190
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def not overwatering its only the top of thst one plant that was closest to.the light i have a thermometer i have directly wgere the top of my canooy is measures 76-78 degrees during lights on with. but the plant im hsvibg ptoblems with is higher than thermometer by 4 to 6 inches and i out my hand wgere that plant was positioned it git warmpretty quickly
 
ShroomKing

ShroomKing

Best of luck. Peace
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Heat stress for me begins with leaf edges curling up and inwards.....I'm leaning towards overfeeding and or pH issues.
But I'm only guessing. Theres not much info to go on.

Best of luck.
Peace
 
DOGBUDS

DOGBUDS

76
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If you have the vertical space, raise that umbrella up! That light bulb you have is giving off killer rays, even from 3 feet, so IMO you will not have any negative effects by backing the light off a little only positive effects.. It looks like you're in a tent so if going up isn't an option, you could get a light mover and this would keep those hot spots down.
 
reeferman420

reeferman420

190
43
ph is 5.9 -6.1 i am only running about 600ppm in feeding the nute ussue i had was one plant git a double dose
 
DOGBUDS

DOGBUDS

76
33
ShroomKing said:
Heat stress for me begins with leaf edges curling up and inwards.....I'm leaning towards overfeeding and or pH issues.
But I'm only guessing. Theres not much info to go on.

Best of luck.
Peace
Click to expand...
Absolutely shroom, I have also seen/observed heat stress cause the curling down thing when there wasn't enough moisture up in there, up in there!!
 
ShroomKing

ShroomKing

Best of luck. Peace
3,127
263
DOGBUDS said:
Absolutely shroom, I have also seen/observed heat stress cause the curling down thing when there wasn't enough moisture up in there, up in there!!
Click to expand...

Interesting.
Maybe some light stress as well ?


@reeferman420 How many plants per container and how big is the container?
 
jumpincactus

jumpincactus

Premium Member
Supporter
11,609
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DOGBUDS said:
Hey Reef,
Sorry to hear about your plant(s), I think a little more info on your set-up will help some of the experienced famers here to better diagnose and potentially fix your problem (i.e., light distances from canopy, room/tent temps/humidity, ventilation, fans, etc..). In my experience when the damage is only towards the top of your plant, its probably heat stress (especially considering the fact that you just introduced a 1000watt heater to your grow area). Plants that have water/moisture readily available can sometimes counter the effects of the added heat by simply expelling more moisture onto their leaves which assists in cooling of the plant. It would be my guess that your issue is a combination of light too close(heat) and not enough moisture(cool) to help the plant deal with the changes you made as well as some ventilation/fan issues.
Things to try: -Put a little more distance between your light and canopy
-Water a little more to counter the new heat you've added to your grow..Also, "completely" drying out your soil
IMO is not good to do, soil should have some kind of moisture to it at all times...
- Good ventilation, especially fans blowing in-between your canopy and light source(s).
Hope this helps a little..DB
Click to expand...
When checking pots for watering, make sure to, if in soil anyway to poke forefinger in up to 1st or second knuckle. If dry then it's time to water. @DOGBUDS is telling you some legit info on the changes in your groom. Tell us a bit more of your stats and enviro.
 
reeferman420

reeferman420

190
43
i have about three ft i can raise it. and ya i been sble to put my finger tgree to four inches in and it be dry so maybe more waterings and i have 5 plants two of them are together in a 10gallon contsiner the other three each habe their own container one a 5gallon the othwr two 7g each
 
DOGBUDS

DOGBUDS

76
33
IMO you should start with raising your light, you will not only get better light spread for all, you will reduce the potential heat stress on the one victim.. Also as Jump said, 1", max 2" of dry soil you'll probably want to think about watering, doesn't mean you have to drench them, just a nice balance that you will need to find. DB
 
reeferman420

reeferman420

190
43
also i have only been giving them each bout a hald gallon of water every three days idk if thats enough
 
reeferman420

reeferman420

190
43
but i did just give them each a gallon they wrre really dry
 
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