Help , Please...Leaf Edges curling and turning yellow

gitarre10000

gitarre10000

Well-Known Member
Hello ,
Newbie here.

Setup:

600W MH
Carbon Filter
500CFM out take fan through reflector
300CFM in take fan
Fan
Temp: 81F
Hum: 39%

3 Berry Ryder Auto
1 Blue Himalaya Auto
1 Auto Assassin


Started in 1" Rockwool Cubes
7 Days , tranplant to party cups with coco coir
Light is 18" above plants
10 days , 1/4 strength rapid start root enhancer
14 days , 1/2 strength rapid start root , 1/2 diamond nectar , 1/2 flora grow , 1/2 flora micro , 1/2 flora bloom
18 days , distilled water

Leaf edges are turning yellow
on plant the leafs are curling up a bit.

I posted yesterday and it was suggested that I add CalMag and full strength nutes. I did that this morning and now they look worse.

The 3st pic is yesterday morning and the 2nd pictures are tonight.

Please help.
Thanks


Please any help would be great.
 

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saynotothebs

saynotothebs

Well-Known Member
clawing of the leaves could mean too much heat...i anit no pro though...they just babies i wouldnt go all crazy with the nutes..but i really dont know anything about growing, just my opinion from doing research on the subject...
 
scroglodyte

scroglodyte

Well-Known Member
looks like heat stress, not that 81F is THAT hot. i would back off the nutes until they signal they are ready for them, with vigorous growth, imo.
 
gitarre10000

gitarre10000

Well-Known Member
Hello ,
Thanks for the responses. It seems its a combo of heat stress and over nutes. I failed to mention that the light is running 24/0.
So if I change the photoperiod to 18/6 , would that be enough to reduce heat stress ?
Should I flush them when they are ready for next watering ?

Thanks everyone
 
DeeTee

DeeTee

Well-Known Member
Changing light schedule to 18/6 would help with the heat stress also make sure your lamps arn't too low and yes I would flush and lower you nute solution.
 
D3monic

D3monic

Well-Known Member
Have you checked PH? your media and water choice are both acidic and that looks an awful lot like I ph issue I had when i first started my plants. Distilled water while ideally is a neutral ph realistically it runs acidic between 5.6->7
 
gitarre10000

gitarre10000

Well-Known Member
Hello ,
I have switched to 18/6 photoperiod. I have flushed the party cups with distilled water that I PH balanced to 5.9.
Is it possible that the big ones with the problems are root bound in the party cups ?
I am going to soak the coco coir in 5.8PH water , then transplant them to 6"x6" square botanicare pots.
Thanks
 
gitarre10000

gitarre10000

Well-Known Member
I soaked the Coir / Vermiculite in PH 6.0 distilled water ( I adjusted it to that ). Hours later I squeezed out enough liquid and retested PH and it as 6.1
Going to transplant to 6"x6" square pots now and since the medium is wet and PH stable , leave them till they are dry before watering again with 50% strength Nutes.
Along with changing photo period , I hope this will help.
Anymore advice from anyone ?
Thanks everybody
 
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