Need help a little stress here

[Cobain420]

I got 3 think different that are growing under 1000w led light.Therenare gonna be 3 weeks old in 2 day

They only got feed with nuten2 time now(Saturday and last night (

I grow them in.plain pro mix hp

I noticed this morning some white on aime leave and was wondering if you guys could help me out

Here a few pic
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[MrAutoGrower]

Over watered bro by the looks of it. Just let it drink up it’s current water/feed and go easy on the watering. How many days are you watering? Every day? If so, try every two or three for now. Wait until the medium dries out a little bit on the top. It does look pretty under developed for three weeks in my opinion, maybe caused some stress from the start. Probably over fed bud

 

[Country Green]

If it looks like dry white splotches could be powdery mildew