New Grower Advice anyone?

[Joe12654]

Hi I'm currently growing some auto double big bud from just feminised seeds. They are feminised.

They are about 2 feet away from a 600w dual spectrum hps on 20 4 a bit closer to 22 2 last few days due to slightly cold temps.

They are 13 days from seed and 10 days from breaking the surface. Have had no nutes yet are in cannaterra professional soil. Been watering whenever surface was dry but after reading what I think was bad advise saturated the soil until I saw run off. Saw a post about soil building up salt pockets that can burn the roots.

The next dark period Wich also dropped to about 18c the leaves on one seemed to droop or curl a fair bit so the lower leaves almost touch the soil. This is the biggest plant and fastest growing aswel funnily enough Wich made me wonder if it myt want some nutes being nearly 2 week from seed.

Any advice would be appreciated.

 

[Joe12654]

Other plant

Hi her is a picture of the droopy one a few days ago it has always seemed a bit droopy compared to the others it's had same treatment apart from has better position in the light. I considered it was expressing a more sativa phenotype but not sure.

Also is a picture of one of her sisters at the 2 stages

 

[mikey1]

I had one that looked a lot like that in a dwc hydro setup. I wasn't sure about the cause but I suspected a) too close to lights b) too much food and c) humidity too low. I corrected all 3 and the problem disappeared within 48 hours. I'm still not sure what the cause was, but I'm glad it worked!