Silk tree in windy spot

I saw a persian Silk Tree (Albizia julibrissin), and have been a little taken with the idea of planting it in the garden.  The tree's label (at the garden centre), suggested it was slow growing, is that true for all of them?  Or are these grown on rootstocks?

I read online that they can have shallow roots, Im wanting to place it in a windy spot, on chalk, I've probably less than  1m of top soil.  Would this be okay?

I've heard they are quite hardy other than that.  The pinnate leaves look like they'd do well in the wind, whereas I had a Willow yanked from the ground early winter (bigger sail).

Thanks.