DaisyI said:I think first, you should find out what kind of butterflys, birds and bees frequent your area and what they are most attracted to.
Then, plant your garden as you find the plants you want after danger of frost is over. You also want to choose flowers that will attract your "guests" over a long period - if everything blooms at once, they won't be around all summer. Don't forget the water source.
BTW: Hummingbirds are attracted to bright flowers with a tubular shape like penstemon.