YES! Your tulips are still good after they bloom!!!!!!! In your climate they should last a long time - some of the fancier varieties do not do as well the second year.
While bone meal is good and recommended by everyone and their mother at garden stores see if you can find something based on rock phosphate and some natural fertilizers for the other food. Bone meal is great stuff but critters like to dig when they smell it and cats seem to love to pee on it. Large rocks help with that (thrown at the cat).
I would HIGHLY recommend spacing the bulbs close together and in a tight group. Since tulips grow somewhat high I would also recommend that you check out blue grape (or white) hyacinths - they come up with a spike with a couple dozen blue/purple 'balls' that look a little like grapes. If you put the tulips in back, grape hyacinths next and a bunch of crocus in front of the hyacinths you will get a fabulous effect. I would also recommend going a little wild and planting 3-4 Crown Imperials behind the tulips - they are huge and expensive but breathtaking. Regular Hyacinths grow very nicely in your climate and the smell makes Honeysuckle smell like a dead skunk by comparison.
Hope some of that helps
The grape hyacinths and crocus will naturalize (baby bulbs come off the main one and they come back with more each year - I dig mine out and seperate them every year when i redo the bulb display... started with 50 of the blue grapes and now have hundreds - fun plant!
Ok, one more thing - Pansies and violas make wonderful low growing companions for the bulbs in Spring.
PS> No, you can't send me the bill if you follow that plan (all but the Crown Imperials are cheap). Make your neighbors chip in if you do all the work!
I have a deal with my mother in law - she promises to beat ovarian cancer for another year and I promise to make next Spring's bulbs prettier than last year's in her yard - last year was over 800 tulips alone so next Spring will be pretty wild.
Use a good quality fertilizer