I looked up Spring Azure and these were listed for host plants:Black Cherry,blueberry,Flowering Dogwood,Grey Dogwood,and viburnum. Hope that helps it's out of a book about butterflies in Michigan. B

Thanks, Brandy. I just looked on butterfliesandmoths.org and it said the spring azure's host plants include dogwood (Cornus florida), New Jersey tea (Ceanothus americana), meadowsweet (Spiraea salicifolia), and Collinsia. I have a dogwood tree but don't know if it's the specific type of dogwood tree that is a host plant or if it doesn't matter. They didn't mention cherry trees but I hope that that is one because I just bought 4 online last week. It seems to be a popular tree with various species of butterflies. We have blueberry bushes and you mentioned them so I'll have to keep an eye on them to see if they get any cats on them. We have two viburnum bushes here but I'm not sure if the butterflies only lay their eggs on a certain type of viburnum; the kind that's here is arrowwood viburnum (Viburnum dentatum). I'll have to see if they get anything on them. I have been considering getting meadowsweet but didn't know which kind to get. Several weeks ago I planted some New Jersey tree seeds that I got from Prairie Moon Nursery so maybe I'll see some on those eventually. I hope that something I have gets the spring azures. I know they aren't a big butterfly but are a pretty color.

I believe the meadowsweets are in the genus Filipendula, and have not been classed as Spiraea for awhile. Perhaps the plant you want is Filipendula rubra?

Here is a link that might be useful: Queen-of-the-Prairie

fledgeling, Maybe I was on some old webpages then if Spiraea hasn't been used for awhile. That would be nice also if the plant I want is Filipendula rubra, because I ordered two plants from PM. Ha, no wonder the filipendula plants and the meadowsweet/spirea plants looked like the same type of flower...they probably ARE the same thing! :-D