Clarkia are bushy hardy annuals of 30 cm to 1.2 m in height. They flower from summer until the beginning of autumn.
They carry rosette flowers of pink or white.
Some common names for Clarkia include Farewell to spring, Rocky mountain garland, Satin flower, and Godeitia.
Clarkia rubicunda by Anniesannuals; Creative commons.
Clarkia by Tom Hilton; Creative commons.
Common Names: Mountain Garland, Farewell to spring, Redspot Clarkia, Godetia. Clarkia: Purple; Pismo; Winecup; Botts's; Northern; Deerhorn; Sierra.
Life Cycle: Hardy annual.
Height: 24 to 60 inches (50 to 150 cm).
Growing Region: Zones 3 to 10.
Flowers: Summer and early autumn.
Flower Details: Pink, red, purple, violet, white. Four petals. Small.
Foliage: Herbaceous. Simple leaves. Small. Evergreen.
Sow Outside: Surface. Sow every two weeks from the last frost through to summer. Spacing 6 to 12 inches (15 to 30 cm).
Sow Inside: Peat pots. Best started outside. Start eight weeks in advance. Germination time four days to three weeks in the light. Temperature 55 to 70°F (13 to 21°C). Transplant outdoors following the last frost.
Requirements: Full sunlight or partial shade. Soil pH 6 to 8.5. Moist soils. Light spring feed (low nitrogen). Regular watering. Stake larger plants.
Miscellaneous: Many species of the Clarkia genus used to be classified in the genus Godetia.
It is best to sow seeds of Clarkia outdoors. They should be sown into a partly shaded or sunny part of the garden on the soil. Sowing of Farewell to Spring and other Clarkia genus plants should start after the last frost of spring and continue every two weeks; this will allow for a prolonged flowering season. The ideal soil for growing should be moist and cool, with a pH of 6 to 7.
Clarkia should be watered regularly so as to keep the soil moist; they may require fertilizer in the spring, this should be low in nitrogen as Clarkia prefers low nitrogen soils.