Several species of annuals have attractive or interesting foliage that is of greater ornamental value than the flowers. These have a unique place in the landscape and container plantings and provide interest throughout the growing season, not just during the period of bloom. Most of these plants are tender annuals and grow best where the frost-free season is relatively long. Exceptions are ornamental kale and dusty miller.
|Common Name||Scientific Name||Regional Adaptation|
|Amaranth, (Joseph’s Coat)||Amaranthus spp.||N, SW, SC, SE|
|Begonia||Begonia x tuberhybrida||N, SW, SC, SE|
|Caladium||Caladium x hortulanium||N, SW, SC, SE|
|Coleus||Coleus x hybridus||N, SW, SC, SE|
|Dusty Miller||Senecio cineraria||N, SW, SC, SE, HA|
|Geranium||Pelargonium hortorum||N, SW, SC, SE, HA|
|Impatiens||Impatiens wallerana||N, SW, SC, SE|
|Ornamental Kale||Brassica oleracea||N, SW, SC, SE, HA|
Key to regional adaptation notes:
N = Northern Idaho valley locations in USDA zones 5 & 6, Moscow to Sandpoint.
SE = Southeastern Idaho valley locations in USDA zones 3 & 4 from Rexburg to Pocatello.
SC = South-central Idaho Magic Valley locations in USDA zones 4 & 5, Burley and Twin Falls.
SW = Southwestern Idaho Treasure Valley locations in USDA zones 5 & 6, Boise area (also Lewiston).
HA = High altitude (>5,000 ft) areas of central, southeastern Idaho and similar locations elsewhere.