ehh, there are a few I like,buut a bulb food with low N and a bloom aspect thats a lil higher. the N dont need to be high just enough to help it along a little. but the P and K ratios should be equal to or better than a say, 3 or so. cpl gallons of soil or more depending how many you have to top coat. and a TBspn or three depending and some Lime. Jobes garden lime is fine. a TBspn er three depending again. but thats all you need.some mix a bloom and bulb food too. even kelp meal or a bone meal. Ilike bone meal and a bloom or bulb fod personally. then mammothp it in when its blended early flower and POW!!