Leaves curling <PICS>

I have small problem with mu 2 plants, the edges of some the leaves are curling downwards. What could be the problem? I am growing inside a cabinet, with PC cooler running almost all the time. No ventilation, just cooler. Plants are still in small pots, 35 days old, so also it can be lack of some nuts.

Anyone had experience with this? Come on guys .

This is the closet.

the leavs dont really look too bad, i would like to see a picture of the whole plant to assess the overall condition. its hard to tell what it could be. what is the temperature in the grow box? also you mentioned there is no ventalation. what kind of cooler are u using. the plants may be deprived of CO2 or something. most problems that concern nutriets, heat, pests, and water quality, ususally leave to leaf discoloration, but ur leaves seem very green so i think its either lack of CO2, or maybe the plants are simply in shock? have u recently tranplanted them or has their grow environment changed in any way?

just notices ur light set up. you need to get that light above the plants, the physical structure of plants are designed to absorb light from the top, so ur problem may be light depravation. also what is the wattage of that bulb? create a way to ventalate air in and out of ur grow space, and get that light above the plants, after a week of that i think u will see some real improvment

I have HPS above the plants - the CFL is additional light - i have homemade CO2 (bottle), but i dont have digital gadget to measute temps and humidity. i thought its heat stress, coz there is low ventilation in the closet. I use onlu PC cooler (u can see it in the pics)

Laze said:

I have small problem with mu 2 plants, the edges of some the leaves are curling downwards. What could be the problem? I am growing inside a cabinet, with PC cooler running almost all the time. No ventilation, just cooler. Plants are still in small pots, 35 days old, so also it can be lack of some nuts.

Click to expand...

What does this mean?

You need ventilation. Fresh air in old used up air out.

Well the closet is partly open 5-10 cm from each side (sliding doors), there is change of air alright, but not as much as should be. That must be the problem, right?

i think ur worried over nothin

I hope so. Coz the first month the leaves were perky, but not they are droopy. The color hasn't changed, its dark green, which is good. Hope it is going to be normal again.

whats your humid at? looks nice and green, but the plant looks like there's a lot of moisture on it