Handbook of Hardy Herbaceous and Alpine Flowers

18 inches 9 inches high adapted alpine annual appear appear in June August autumn base beautiful beds blue branches bright Britain character close clothed cold collections colour common continue cultivation culture cuttings deep dense distinct dwarf early easily Edition effect erect Europe feet high flowers foliage foot frame freely gardens genus green ground grows growth habit handsome hardy height herbaceous increased interesting Italy July June kind known lance-shaped late leaves less light loam March masses means mixed border moist months named narrow Native nature North America numerous ornamental perennial pink places plants position pots pretty produced Propagate by division purple racemes rare require rich rockwork roots sandy seed selection shade short showy soil sort species spikes spring stalks stems subjects succeed summer terminal toothed tufts varieties warm winter woods worthy yellow