Bloom Times - Excellant Chart

I'm wondering how I can adjust this blooming chart to my zone (7a).

Any ideas? It's not exact science but good for a beginner like myself

The figures come from the state of Missouri or zone 5

http://www.mobot.org/gardeninghelp/plantfinder/blmsum.asp?code=date

What a great chart -- I don't know enough to say how to convert to zone 7, but this definitely gives me a good idea of what blooms when and for how long... thanks for sharing it!

My pleasure

I'm guessing a few weeks earlier for my location but what's two weeks?...and yes it is valuable for a newbie like me.