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twisted new growth on cannabis

New Leaves curled up and twisted

Philo2
Active Member

I’m 4 weeks into veg and just about to put my plants into flowering.

Many of the new leaves are coming out very twisted and curled upwards. I’m holding off on flowering until I can diagnose this problem. The problems does not seem to be affecting the plants which I replanted in new soil as much as the ones in older dirt.

I’ve looked all around for an answer but can’t find a problem for leaves curling up and twisted. They are not droopy at all.

-I only water when dried out. Once every 3 days
-I’ve been phing my water to 6.5 before watering
-i’m only using nutes once a week. Botanicare growth.
-temps are low. Right around 73 degrees
-no color changes or dying leaves
-it’s only affecting new growth. The older fan leaves look fine.

Any ideas? I’m thinking a nute deficiency, but which one?

I’ll post pictures soon.

Philo2
Active Member

Here are some pics, if anyone has any ideas. I can’t imagine it’s too much nutes, since I only use about 40% strength once a week.

I’m going to flush some of them out to see if that fixes the problem. It can’t hurt.

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Secret Jardin
Well-Known Member

Here are some pics, if anyone has any ideas. I can’t imagine it’s too much nutes, since I only use about 40% strength once a week.

I’m going to flush some of them out to see if that fixes the problem. It can’t hurt.

Philo2
Active Member

No visible change in the plants I flushed. Overall the plants seem to be getting worse. Some leaves are rolling up like a cigarette. Picture #4 best shows the problem.

Any ideas? I’m freaking out here . I’ve read as much as I can but can’t identify this problem. There is no discoloration to any leaves, new or old.

Checked PH of the runoff and it’s right around 7.

itsgrowinglikeaweed
Well-Known Member
Philo2
Active Member

Thanks for you input. I agree it looks like a heat issue but I’m just not sure.

A few things indicate it’s not. I’ve been checking the temps everywhere and nothing comes up high. I have two ocillating fans and a large can fan. It seems to be affecting the shortest plants, the ones farthest from the light, the most. The plants that were transplanted to 5 gallon pots were closest to the light but showed the least signs of problems. The problem is also affecting the lower growth as much as the top growth. It is affecting all new growth. I had been running the lights 24 hours. I just switched them to a 18/6 cycle to see if that will solve the problem.

I let the top couple of inches of soil dry out before I water but they never drooped like they were thirsty. The problem seemed to get worse yesterday after a nute free watering. Also last night I pulled the lights all the way to the ceiling with no change.

Thanks for you help everyone. I’ll keep you updated, when I come up with a cure.

I'm 4 weeks into veg and just about to put my plants into flowering. Many of the new leaves are coming out very twisted and curled upwards. I'm holding…

Twisted curling new growth at various stages

MrMackey

That’s one og in flower the twisting is now accompanied by rust spots which appeared 5 weeks into flower (tried upping calmag)

some details of the veg room
Plants grown under 600w mh kept around 20-24” above
In coco 70/30perlite mix
Hand watered using advanced 3part, roots excellurator, cannazyme, supervit, plantmagic calmag ay 1ml/L total ec 1.2 young-1.6 established plants ph 5.7-6.1
Room temps 24/25 day 20/21 night
Rh 45-60% min max on the thermostat always around 50 when I see it

the flower room
1000w de gavitas dimmed to 800w plants start 6ft away wen flipped grow to be 3/4ft away after stretch
Bottom fed coco/perlite alien easy feed system
Ionic coco bloom, calmag 0.5-1.5ml per l (tried up and down but giving 1ml currently) Buddhas tree additives pk 9/18 metaboost silicone flowerburst as directed ph 5.8-6.3 although some mornings ph in the res is insane 4.x Or 7.x so could be getting the odd fucked up feed in the night? This is a non recirculated system so don’t understand when these random ph things happen?
Day temps 26-29
Night 20-22
Co2 ppm 800
Rh 47-62 min max

Hi all been struggling abit with this one for a while got this weird twisting of leaves I see it in the veg room once the plants are around 3/4weeks old… ]]>