I also have the Astrid blue ones and I will tell you that you're one of my favorite because Aster perennial status coming up year after year and the fact that they bloom forever and ever, all season long. The only thing that you have to keep in mind is that you have to deadhead or they will not rebloom. If you just have done you will be rewarded with Beauty all season long.
Thanks for sharing this with us!
Upped and reposted