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cannabis seedling leaves curling up

Seedling Leaves Curling Up

Shanus
Active Member

I know this has been covered millions of times, but i didnt find any pertaining to seedlings only about 10 days old. Here’s the short setup

1 part perlite
3 part peat moss
1 part vermiculite

Soil ph steady at 6.7 Watered with tap water buffered to 6.0 w/sulfuric acid (perhaps this is issue, first grow using s/a as ph lowering?)

1000w mh bulb was at 8″ above plants, now at 24″ above plants. Cooled hood, no heat issues. Good air circulation, not direct at plants.

Humidity always 40-50% day temp 78deg, night 72deg

My last grow was with a 400w hps and I didnt have this issue. Anyone seen this before? All seedling are feminine white widow and Himilayan gold. Since they show this curl regardless of genetics, I’m gna rule that out. All seedlings treated the same since birth.

Thanks in advance for any ideas. I’m hoping this thread may help me and many others

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bizzarebud
Well-Known Member
BEEFY
New Member
pinkjackyle
Well-Known Member
Shanus
Active Member

Thanks for the replies so soon. Im new to the 1000w club, but so happy ive got too much light. for anything. Im using this potting mix until i repot into 3gal w/1 part perlite and 1 part verm. Im still so confused about the earth juice i got, Im not sure how to ph it.

I had read NOT to give nutes in the first 2 weeks, but mayhaps they are already gna need some? Im doubting this is a nutrient issue..yet. They are soo young. If the light kicked their ass, are they gna bounce back now that I’ve moved it up? Man I hope so, I was hoping for a 3×3 (9) plants, and am so running out of seeds. Im staring in on ’em every 4hrs or so, so I’ll keep close tabs on it. For now, the light has been raised to 24″ for the last 36hrs, let’s hope that bounces em back. Any chance this is from over watering? Thanks again

BEEFY
New Member

Thanks for the replies so soon. Im new to the 1000w club, but so happy ive got too much light. for anything. Im using this potting mix until i repot into 3gal w/1 part perlite and 1 part verm. Im still so confused about the earth juice i got, Im not sure how to ph it.

I had read NOT to give nutes in the first 2 weeks, but mayhaps they are already gna need some? Im doubting this is a nutrient issue..yet. They are soo young. If the light kicked their ass, are they gna bounce back now that I’ve moved it up? Man I hope so, I was hoping for a 3×3 (9) plants, and am so running out of seeds. Im staring in on ’em every 4hrs or so, so I’ll keep close tabs on it. For now, the light has been raised to 24″ for the last 36hrs, let’s hope that bounces em back. Any chance this is from over watering? Thanks again

Shanus
Active Member

Well, Ive since watered my babies with 1/2 strength earth juice grow and a touch of bloom. I repotted them in perlite/verm mix and they took the transpant well it seems. Tiniest drooping, but success i think. I know the roots aren’t logged in water, and the lights have been at 32-36″ above plants for about a week now, yet all the leaves are still curling? WTF! My temps and humid are always spot on, and even the new leaf growth shows signs of curl from the get go.

Im now out of seeds for the space I’ve alotted, so off to spend another 75$ to try 10 more beans. How aggravating, all the best plans in the world and BOOM, time to regroup. Anyone have any ideas? Thanks

I know this has been covered millions of times, but i didnt find any pertaining to seedlings only about 10 days old. Here's the short setup 1 part perlite…