| A few of the hardiest perennials for Colorado include: Penstemons: Rocky Mountain (Penstemon strictus) and Scarlet bugler or iron maiden (Penstemon barbartus); Hollyhock, Alcea Rosea, easy from seed and often self-seeds; Purple Coneflower, Echinacea purpurea, a native of the tallgrass prairie, large clumps can be divided; Lupine hybrids, Lupinus; Black-eyed Susan or Gloriosa daisy; Mexican hat coneflower: Ratibida columnifera. Best wishes with your garden! |
