Watch your heat if you're in a small space.. more info on what you got going on would help people give you more advice.. seedlings or clones, what's your grow area like, mh or hps?
Hps whole time got 11 seedlings under there 2 weeks old lights 3 feet away there some bagseed kush I was told.
Using fox farm trio Nutes in soil soil is ffof ik it kills microbes don't tell me. Lol I've had grows befor but never harvested bud hoping some of these are female
The area is medium size I got 2 holes for fresh air vents in the room temps don't reach above 80 might post pic
Post pics man. Always helps.. An EDIT ur posts. Why do you water every other time with nutrients? You really shouldnt need nutrients for a while after planting in the FF bro. But to ur original question - HPS whole way thru is fine
ff soil by itself can sustain the plants for 4 weeks. and if you feed them for the hell of it, you'll be getting a lot of nute burn in the future.