feeding your seedlings nutrients

[sadhu9]

At what stage would you start feeding your seedlings nutrients? My seeds are germinated in 1.5" rockwool cubes and have only water and some helpful rooting supplements added to it. I have heard differing answers to this question.

Thanks...

 

[Highpotanoose]

1/4 strength after your plant has 4-5 full sets of leaves or 4 nodes tall

 

[trichomes]

1/4 strength after your plant has 4-5 full sets of leaves or 4 nodes tall