Previously beautiful plants... heat stress? [hi def pics]

36OhBuds

36OhBuds

Active Member
Recently we went through a bought of HOT weather for the northwest, like 90ish, and I have no A/C in my place and my tent got up to 88 I realized with CFLs + my LED running so I had to turn off the CFLs.

I've noticed this starting yesterday, and continuing today.


16 Days Old, Bubblelicious, bottom set of leaves has this on them, but top set is fine? The cfls were hanging to the side but they were like 2-3" away. Maybe had hotspots in tent?
plant_issues_may61.jpgplant_issues_may62.jpgplant_issues_may63.jpg


27 Days Old, Plant that survived bucket algae, recooping in soil, has not got any nutes, curling downward for about 48 hours now, but markings are new from today
plant_issues_may64.jpgplant_issues_may65.jpg


16 Days Old, Silver Sufer (Notice the Tacoing leaf in center of picture it's rolling inward. That's heat right?)
plant_issues_may66.jpg

So nutrients or heat? Because I've got a seedling that's 6 days old that is doing just fine and reaching for light, but he is about 8" from the CFLs and under the LED.
 
learning05

learning05

Active Member
No way to tell for sure but heat seems likely considering it got to 90. Could be nute burn or a ph issue also. Is there any way to increase airflow and maybe have a fan blow over a bucket of frozen water- kinda like a cold humidifier? I guess start fixing environmental issues and check the ec, ppm. and ph. Does your tent have in/out airflow?
 
Dr Kynes

Dr Kynes

Well-Known Member
36OhBuds said:
Recently we went through a bought of HOT weather for the northwest, like 90ish, and I have no A/C in my place and my tent got up to 88 I realized with CFLs + my LED running so I had to turn off the CFLs.

I've noticed this starting yesterday, and continuing today.


16 Days Old, Bubblelicious, bottom set of leaves has this on them, but top set is fine? The cfls were hanging to the side but they were like 2-3" away. Maybe had hotspots in tent?
View attachment 2645943View attachment 2645945View attachment 2645947


27 Days Old, Plant that survived bucket algae, recooping in soil, has not got any nutes, curling downward for about 48 hours now, but markings are new from today
View attachment 2645950View attachment 2645952


16 Days Old, Silver Sufer (Notice the Tacoing leaf in center of picture it's rolling inward. That's heat right?)
View attachment 2645954

So nutrients or heat? Because I've got a seedling that's 6 days old that is doing just fine and reaching for light, but he is about 8" from the CFLs and under the LED.
Click to expand...

youre overwatering.

make sure you have lots of holes in those cups. poke holes all around and up the sides, leave just enough cup to keep the dirt inside, and water a lot less.
 
36OhBuds

36OhBuds

Active Member
So I checked the pH of my soil and it's fine, 6.4-6.7 over 6 tests. Don't think it's that.

Dr Kynes said:
youre overwatering.

make sure you have lots of holes in those cups. poke holes all around and up the sides, leave just enough cup to keep the dirt inside, and water a lot less.
Click to expand...
Will the overwatering cause the burned tips like that though/maybe a lockout?

The cup plants just got moved from the cups into .5 gal containers because originally the soil I was using in the cups was SHIT... It was like cake when it got wet and just didn't have any air in it. I have them in 2:1 soil to perlite with a little worm casting and it seems to take water in much more evenly.

They got water last night because the cups were bone dry like feather light almost repelling the water when I watered. The temps are good today so we'll see if new growth looks fine, that's what I should be looking at right? and that the damage doesn't spread?
 
*BUDS

*BUDS

Well-Known Member
Also you have nute burn ,brown tips(early sign) tell you your feeding too much ,back off, if they are burnt along the margins also they will probably die.
 
36OhBuds

36OhBuds

Active Member
*BUDS said:
Also you have nute burn ,brown tips(early sign) tell you your feeding too much ,back off, if they are burnt along the margins also they will probably die.
Click to expand...

I don't get how it could have nute burn if it's in black gold and it hasn't been fed... The other ones have, but that guy hasn't. Could their organic soil REALLY be THAT hot? I heard it had no added nutrients and was easier on young plants than FFOF which is why I went with it...
 
36OhBuds

36OhBuds

Active Member
I should also add: I have NEVER watered the 3 gallon pots to runoff.

Nor the .5 gallons the cups were just transplanted into.

Should I?

EDIT: The plant that came out of that cup you see above that has brown tips had awesome looking roots, spinning the cup thick and white. In fact they all did.
 
MYOB

MYOB

Well-Known Member
that doesnt look like heat stress to me. The folded leaves are normal in new growth when they dont have the room to spread out yet.

Burnt tips on seedlings usually indicates over fertilization.
 
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