Annual flowers differ in their ability to withstand shade while maintaining attractive foliage and producing blossoms. Most annuals require some full sunlight during the day, but here is a list of plants, suitable for Idaho, that can withstand part or full shade and still be attractive.
|Common Name||Scientific Name||Regional Adaptation|
|Ageratum (P)||Ageratum houstonianum||N, SW, SC, SE, HA|
|Alyssum (P)||Lobularia maritime||N, SW, SC, SE, HA|
|Begonia (F)||Begonia x tuberhybrida||N, SW, SC, SE|
|Coleus (F)||Coleus x hybridus||N, SW, SC, SE|
|Fuschia (F)||Fuschia x hybrida||N, SW, SC, SE|
|Impatiens (F)||Impatiens spp.||N, SW, SC, SE|
|Nicotiana (Flowering Tobacco) (P)||Nicotiana alata||N, SW, SC, SE|
|Pansy (P)||Viola spp.||N, SW, SC, SE, HA|
|Snapdragon (P)||Antirrhinum majus||N, SW, SC, SE, HA|
(P) = Tolerates dappled or part-shade conditions.
(F) = Tolerates full shade conditions.
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.