There's a soluble fertilizer (one of those blue crystal-dissolve-in-water kind) with a 10-30-20 ratio. Used to be sold as Peter's Blossom Booster, now available as Jack's Classic. It has long been my favorite for potted bulbs and indeed, for most potted plants. With outdoor plants is not merely healthy growth that I'm concerned about. Here in deer country Bambi and his relatives love lush, well-fertilized plants. They'll walk right past the wild-growing, untended Hemerocallis fulva in order to chow down on cultivated, fertilized cultivars in the garden. Accordingly, I prefer to grow plants somewhat on the lean side - gourmet rather than glutton. I fertilize when planting / transplanting, use a granular 5-10-10 incorporated with the soil and Jack's Classic as an aid to overcome transplant shock for plants that are in active growth at that time. I've also used it as a root soak for dormant bulbs with permanent roots prior to planting - lilies in spring, for example, but not in fall, and also for hippeastrum. Anyone else have thoughts about timing of fertilization? Judy in New Jersey where the days are obviously lengthening and my mantra is "Every day is another day closer to Spring."