1st grow..

I started with 2 Zkittlez & 2 Gelatos but one of Gelato Girls didn't make it (not strong enough to break the shell off) I was down to 3 seedlings so I started Barneys LSD strain which has grown rapidly in 2 days. So back to having 4 girls I was happy and content. The mrs then wanted to get involved last night and insisted we plant some blueberry OG.. (talk about being under the thumb) The germination method used has been: shot glass with distilled water for 24hrs then into moist paper towel for a further 12 hours or so (until tap root appeared) then into soil above a Maxibright LightWave T5 48w. The remaining Gelato seedling and the Zkittlez are 12 days old and the LSD is 5 days old.. would I be able to start feeding the older girls now? maybe I should have already started? They're in biobizz light mix. 1st time growing little bit anxious but excited at the same time.