I don't know anything by the way...I'm just going by my own experience with giving semps very fertile soil and having many bloom out, the hen and all the chicks on some plants!!! (so I'm thinking fertilizing may do the same thing, but I don't know if quick start is only to produce offsets and more roots or what?? Or how "focused and specific" the fertilizer is for these plants!) I rarely use plant food and then began using super thrive for my indoor plants, and it really is working, the plants are doing great! But none of them are semps!