Diagnosing Issue | Leaf Curling

[eddie420]

Indoor/Outdoor: Indoor
Growing Medium: Soil/Sand/Perlite
Growing Style:
Watering/Feeding Frequency: As needed
Nutrient Strength (PPM/EC): None
PH Levels: Unknown
Temperature/Humidity Levels: between 12-22 degrees
Air Flow/Fans etc.: CanFan 125mm, passive intake (ducting)
Lighting Type (CFL/HPS/MH etc.): Sol-Sense 315W LEC
Total Wattage: 315W
Growth Stage: Just switched to 12/12
Plants Age: 3 months
Cannabis Strain: GSC x OG Kush

 

I just re-potted this lady into a fabric pot, gave her a mix of compost, soil, sand & Perlite, then gave her a good water. She's been under a 130W CFL for a few months and vegging well, but has now started to show some signs of stress (see pic). I feel like temps may be too low, so I've switched off the exhaust fan, and am going to add a 60cm tube heater shortly. Any ideas what may be the issue?

 

Any help much appreciated!

E420

[Gazza2001au]

The leaf curling is because of too much heat man turn your exhaust fan back on and leave it running 24/7, whats your humidity reading? could possibly be to low

 

I'm not a soil guy but i thought sand and perlite does the same thing?

Edited June 30, 2017 by Gazza2001au

[eddie420]

Thanks Gazza, so direct heat from the lamp, meaning I should raise it up? Humidity is high now that I've turned the fan off (80%). I have a small de-humidifier that I'm going to put in the tent. The temp in the tent is getting no higher than 22 degrees Celsius at the moment... the tent is in a big cold shed

[eddie420]

The reason I turned the fan off was because of a recent thread about the fans being too powerful for smaller tent setups, and drying out the plants...

[eddie420]

So, my plant is still looking unhappy. Leaves curling upwards. I raised the light so it's now a good 24" above the canopy. I have a 60 cm tube heater in there now so the temps are looking good, around the 24 range during the day. Humidity is now at 68% since I put the dehumidifier in. I have 3 other plants in there, one in late stages of flower, and the other two just switched to 12/12. The other plants don't seem to be suffering like the Cookies Kush...

 

Any ideas? I've given her a good drink too...

 

Edited July 4, 2017 by eddie420

[Gazza2001au]

Your medium looks really dry those fabric pots air out very quickly

[eddie420]

Yeah, the top of the soil is dry but when I dig down an inch or so the soil is still quite moist... Edited July 4, 2017 by eddie420

[brick]

Over watering can cause the same problem. 

[eddie420]

Over watering can cause the same problem.

Thanks Brick, that has been on my mind. The pot feels heavy. Heavy with water. I'm now transferring her to outside on days when the weather is warm...

[_Puff_Tough_]

Dont use fabric pots in a heated grow room. High humidity sucks, fucks with mobilisation of micro/macro nutrients within the plant. Dont use that fucking hay either its not growing in a paddock