I would add Earth Juice Grow and Catalyst. Mix them half strength when your plants get their third set of leaves, then increase the strength if you do not see any nute burn
they all do pretty much the same thing get what you can afford. wait 2 to 3 weeks for nuting if they look strong enough. start at 1/4 mix and work your way up slowly. what is the n/p/k of the soil.