25 days old in 1 gal. pro-mix, should I be adding nutes yet?

Title pretty much says it. I did add nutes a few waterings ago and I burned a few of 'em a bit. Should I let 'em get what they need from the potting soil and wait or start a light base nute? I think I may have something a little off-tweak here b/c my leaves don't have that lush green color....on some of my bigger plants, the new leaf growth is really light green. I will have to post some pics.

ProMix is just a medium , it has no fertilizer added .. Your plants are in need of nutrients .. Best to buy a PPM meter so you know the Ocatane your feeding !

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Well I was wrong about the color of the leaves. That metal halide light is so white, it makes the leaves look much lighter green than they really are. When I took a couple plants out of the tent and looked at them under a normal light, the lush green was there.