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Cercis occidentalis
Western Redbud
Cercis occidentalis
Cercis occidentalis, or Western redbud, is a small deciduous tree native to the western United States. It's known for its vibrant pink to purplish-pink flowers that bloom directly on the branches (cauliflory) before the leaves emerge in spring. The heart-shaped leaves are a medium green, turning yellow in the fall. It's a relatively drought-tolerant tree once established, and prefers well-drained soil. It can be a bit slow-growing compared to some other redbud species.
CategoryDetails
Plant TypePerennial plant
Duration to maturity5 years to harvest
Estimated Plant Lifespan50 years lifespan
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Insect pollination

Notes: Bees and other pollinators are attracted to the flowers.

Watering Requirements

Method: Top watering

Frequency: Water deeply, but infrequently, allowing the soil to dry out slightly between waterings.

Notes: Once established, Western redbud is fairly drought-tolerant.

Humidity Requirements

Level: Moderate

Cleaning RequirementsPrune lightly after flowering to maintain shape and remove dead or damaged branches. Avoid heavy pruning, as this can damage the tree's ability to produce flowers.
Temperature Range

Min: -12°C

Max: 38°C

Quercus turbinella
Sonoran scrub oak
Quercus turbinella
California scrub oak provides shade and helps to retain moisture in the soil, beneficial for Western redbud, especially in drier climates. The oak's deep root system doesn't directly compete with the redbud's shallower roots for water.
Penstemon spectabilis
Showy Penstemon
Penstemon spectabilis
Showy penstemon is a drought-tolerant native perennial that complements the redbud's spring flowering with its own vibrant blooms later in the season. They don't compete for resources significantly and add visual interest to the garden.
Acer negundo
box elder
Acer negundo

Boxelder maple is a fast-growing tree that can quickly outcompete the Western redbud for water and nutrients, especially in areas with limited resources.

Aphids

Aphids are small, sap-sucking insects that can cause leaf curling, yellowing, and stunted growth. They excrete honeydew, which can lead to sooty mold.

Scale insects

Scale insects attach themselves to branches and leaves, sucking sap and weakening the tree. They are often difficult to spot, but their presence can be indicated by discoloration and sticky residue.

Steps:

    • Collect seeds in the fall after they have ripened and dried on the tree.
    • Soak seeds in water for 24 hours before sowing.
    • Sow seeds in well-drained soil in a seed tray or directly into the ground.
    • Keep the soil moist until germination.
    • Take semi-hardwood cuttings in summer.
    • Dip cuttings in rooting hormone.
    • Plant cuttings in a mix of perlite and peat moss.
    • Keep moist and shaded until roots develop.

Neem oil

Effective against aphids and other soft-bodied insects.

Insecticidal soap

A gentler option for pest control, particularly effective against aphids and some scale insects.