Don't fertilize them at all for the first two weeks. The plant is A BABY right now......no muscle milk until she gets muscles....
seriously, the plant has food built in that will serve it just fine for two weeks....after that you should be ready to fert.
While they are young, give them half strength, timed by the directions. Over-fertilizing them when they are young equates to a form of stress, which ultimately costs you in biomass....