Here in my area of Kentucky, daffodils, crocus, and spring Iris are flowering! Tulips and hyacinths are also on the rise.
Spring flowering bulbs are hungry harbingers of spring. They will benefit from being fertilized in the spring while the green is emerging or when they just start to flower.
Tulips in particular can be finicky, you really have to pick the right variety for them to persist in the garden. Some varieties, if planted in an ideal setting, can persist a little longer than expected. That being said, tulips definitely benefit from fertilization each spring.
Just pull back the mulch and apply an all purpose organic fertilizer of your choice at the recommended rate. I use Bio-Tone.