Always detach the top inch of the flower stem so the daffodil will increase its bulb size instead of making seed. Plant daffodils 6 to 8 inches deep, less for smaller species bulbs. In early spring, top dress with a balanced commercial fertilizer. Daffodil Bulb Sizes Can Be Confusing In Holland, daffodils and most other bulbs are graded into several sizes. All daffodil bulbs have at least one nose from which the stem, leaves and flowers emerge.
Some daffodils regularly produce bulbs with one, two, three, or more noses.