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You have to start in the Fall to get a really pretty Spring Fling.
Start with crocus, snowdrops, and winter aconite. These just signal, Spring is here!
Others to consider are daffodils, tulips, iris, so many different varieties to choose from and anemones. Alliums, Iris, and ranunculus should be planted as soon as your weather permits. Living on the Coast, I will wait a little later to plant than a lot of you.
Early blooming snowdrops, daffodils, tulips that bloom the middle of spring and then alliums that will bloom all summer long would be a good choice. I don't have good luck with tulips, I wish I did, I love them. If I lived further North, this is what I would plant for Spring and plant them all in the same area.
It would go like this: About the time the snowdrops begin to fade the daffodils will come up and continue the show. Next the tulips will appear so you won't notice the daffodil foliage when it starts to die off. Then along comes your pretty Iris or Alliums for color that will last throughout the rest of the season.