winter-hardy aster dumosus `blaue lagune` with blaue flowers in october. aster is a genus of perennial flowering plants. berlin

architecture aster asteraceae asters beautiful berlin blaue bloom blooming blossom blue botany building collects color colorful daisy dumosus family field flora floral flower flowering flowers fresh garden genus germany grass green hardy lagune landscape leaf macro natural nature nectar october outdoor park perennial pink plant plants season tourism tree winter winterhardy yellow