https://www.rhs.org.uk/plants/340777/symphyotrichum-laeve-blauschleier/details
Find help & information on Symphyotrichum laeve 'Blauschleier' from the RHS
symphyotrichum laeverhs
https://www.rhs.org.uk/plants/340684/symphyotrichum-laeve-blue-bird/details
Find help & information on Symphyotrichum laeve 'Blue Bird' from the RHS
symphyotrichum laeveblue birdrhs