...you can add fertilizer and leave in the smaller pots for now, but they will soon need to be transplanted....or you could transplant now. I typically don't put young plants into large pots because the soil doesn't dry out as fast as I like. I transplant clones into those party cups, let grow for 2 weeks, then transplant into 2/3 gallon pots for flowering. Growing from seed, I let them stay in the party cups for about 3 weeks.