Alphabetical Plant Listing

Clarkia williamsonii (Fort Miller Clarkia)

Fort Miller Clarkia, Godetia viminea var. congdonii, Godetia viminea var. incerta


Endemic to California, Clarkia williamsonii (Fort Miller Clarkia) is an upright annual boasting ravishing clusters of cup-shaped, slightly flaring flowers from late spring to mid summer. The flowers are formed of 4 overlapping petals colored white around the base, lavender higher up, with a darker purple blotch near the upper edge. Borne on erect, lightly hairy stems lined with linear to lance-shaped leaves, 2.5 in. long (6 cm), they give way to dry capsules, which split open when mature to release their numerous seeds. Attractive to bees and butterflies, Fort Miller Clarkia may reseed in the garden in optimum growing conditions. Easy to grow, low maintenance, Fort Miller Clarkia is suitable for beds and borders, wildflower and pollinator gardens.

  • Grows up to 12-36 in. tall (30-90 cm) and 10-12 in. wide (25-30 cm). May reseed in the garden in optimum growing conditions.
  • Thrives in full sun or part shade in poor to moderately fertile, slightly acid, moist but well-drained soil. Appreciates good air circulation. Performs poorly in hot and humid summer weather. Drought tolerant.
  • Great for beds and borders, cottage gardens, rock gardens or containers.
  • Cut back after flowering.
  • Generally pest free. Keep an eye out for foot rot and stem rot. Deer resistant.
  • Propagate by seed sown in-situ in early spring or autumn. Start seed indoors in pots 6-8 weeks before last frost date or sow directly in the garden as soon as the danger of frost has passed. 
  • Native to California.

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Requirements

Hardiness 2 – 11
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early,Mid)
Height 1' – 3' (30cm – 90cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Low, Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, California
Tolerance Deer, Drought
Attracts Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

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Sundry Photography, Shutterstock, John Rusk, Tom Hilton, Flickr

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 2 – 11
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early,Mid)
Height 1' – 3' (30cm – 90cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Low, Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, California
Tolerance Deer, Drought
Attracts Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

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