Some annual flowers can withstand hot, dry growing conditions and still provide attractive foliage and/or flowers. These plants may find their best use in the warm valleys of southwestern Idaho, though they will grow well in many other places in the state.
|Common Name||Scientific Name||Regional Adaptation|
|Amaranth, (Love Lies Bleeding, Joseph’s Coat)||Amaranthus spp.||N, SW, SC, SE, HA|
|California Poppy||Eschscholzia californica||N, SW, SC, SE, HA|
|Celosia (Cockscomb)||Celosia cristata||N, SW, SC, SE|
|Dusty Miller||Senecio cineraria||N, SW, SC, SE, HA|
|Four-O’clock||Mirabilis jalapa||N, SW, SC, SE|
|Gaillardia (Annual Blanket Flower)||Gaillardia pulchella||N, SW, SC, SE, HA|
|Gazania||Gazania rigeas||N, SW, SC, SE, HA|
|Larkspur||Delphinium ajacis||N, SW, SC, SE, HA|
|Moss Rose||Portulaca grandiflora||SW, SC, SE|
|Phlox||Phlox drummondii||N, SW, SC, SE, HA|
|Rudbeckia||Rudbeckia hirta||N, SW, SC, SE, HA|
|Salvia||Salvia spp.||N, SW, SC, SE, HA|
|Sunflower (ornamental)||Helianthus annuus||N, SW, SC, SE, HA|
|Zinnia||Zinnia elegans||N, SW, SC, SE|
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.