light to dark violet coloured flower of rose hybrid mainzer fastnacht, cultivated by company tantau

light dark violet coloured flower rose hybrid mainzer fastnacht cultivated company tantau year 1964 blossoming rosarium summer flowering season late july rose flower hybrid cultivar petals blooming blossoming bloom blossom decorative ornamental growing rosarium garden gardening symbol love valentine fastnacht tantau 1964 violet gradual gradiet color gradient colour gradient