I just found a terrific Bloom Time Chart of perennials on Garden Advice.com.

I copied it to a spreadsheet, then highlighted the plants I already have. I added some bulbs and trees, and noted when bloomtime has been so far this year. Then it was easy to see what time of year I need more bloomers, and have a list of suggestions.

This is going to be a great tool for me! And easily adjustable to my garden's climate.

Daphne in Tacoma

Here is a link that might be useful: Bloom Time Chart