When shoud i start giving my seedlings nutes?

[statictattoo]

Hey guys.. my seedlings are starting to turn pale green yellowing on the edges..They are 7 days old, well 7 days since i put the cracked seeds into the rockwool cubes...
heres some pics.. any opinions would be awesome

 

[Wait...What?]

rockwool has no nutritional value for the plant. fertilize a very weak solution immediately.

I wet up my rockwool with ~250ppm of veg nutes.

The cotyledons have nutrition in them to get the plant started, but now your seedling is looking for nitrogen.

 

[LiLWaynE]

Hey guys.. my seedlings are starting to turn pale green yellowing on the edges..They are 7 days old, well 7 days since i put the cracked seeds into the rockwool cubes...
heres some pics.. any opinions would be awesome

what nutes are you feeding them?

listen to wait...what

 

[cheeseduck20]

weird..

weird..

just woke up with this question on my mind and heres a nice thread on it. I have some seedlings about the same age and they look like they could use some N, but also seem to be "praying" for some mg. Anybody give their seedlings epsom salts or should the little bit of mg in the PB gro do it? any suggestions appreciated as this is my first seed grow. Thanks.

 

[statictattoo]

yah.. i pretty much figured thats what it was.. Im heading down to my grow shop to pick up a ppm meter.. I'll give em a light feeding later tonight

LiLWayne: So far the only nutes these girls have gotten was a drop of superthrive at germ. and the nutes from tap water. I am planning on using GH Flora Series.. probably just Bloom and Micro