Alphabetical Plant Listing

Collomia grandiflora (Large Flowered Collomia)

Large Flowered Collomia, Grand Collomia, Large-flower Mountain-Trumpet, Collomia


Adding pastel color to the garden, Collomia grandiflora (Large Flowered Collomia) is a charming annual wildflower boasting ravishing clusters tightly packed with pale peach to white flowers in mid spring to mid summer. Each tubular flower, 1 in. wide (2.5 cm), features 5 curving petals and anthers tipped with blue pollen - for a lovely contrast. Bees collect the bright blue pollen from the blossoms. The flowers are borne on erect, hairy or fuzzy stems clad with long, lance-shaped leaves. They give way to capsules that contain sticky seeds. This plant spreads by reseeding itself and keeps a presence in the garden. Great as a cut flower.

  • Grows up to 18-24 in. tall and wide (45-60 cm).
  • Performs best in full sun to part shade in dry to moist, well-drained soils. Prefers partial shade and dry soils.
  • Stunning when massed in mixed borders, cottage gardens, woodland gardens, naturalized areas or containers.
  • No serious pest or disease issues.
  • Propagate by seed sown in situ in spring or autumn.
  • Native to western North America.

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Requirements

Hardiness 6 – 9
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid,Late)
Summer (Early,Mid)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 18" – 24" (45cm – 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, California, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Utah, Wyoming, Southwest, Nevada, Arizona
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Informal and Cottage, Prairie and Meadow

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Tom Hilton, Willamette Biology (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 6 – 9
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid,Late)
Summer (Early,Mid)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 18" – 24" (45cm – 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, California, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Utah, Wyoming, Southwest, Nevada, Arizona
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Informal and Cottage, Prairie and Meadow

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