Seadlings are 2 weeks old, per the Fox Farms chart you can start using nutes in the very begining, so the question is has anyone used nutes on seadlings?
Depends on your media. I use straight Pro-Mix and mix 1 tbsp per gallon at about 2 weeks. DO NOT follow their chart! If you use more than 2 tsp of the GB it will burn. The TB you can get away with it,