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    • Photo of Ceanothus 'Cynthia Postan' foliage by Cistus Nursery

    Photo by Cistus Nursery

    Used with permission, all rights reserved

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    Ceanothus 'Cynthia Postan'

    Also Known As

    • Cynthia Postan California Lilac

    Plant type

    shrub

    size

    • H: 6'-8'
    • W: 8'-10'

    planting zones

    • 8a-11

    More Options

    Ceanothus 'Cynthia Postan' plant details

    Ceanothus 'Cynthia Postan' is a broadleaf evergreen shrub with green foliage. In spring blue flowers emerge. Features glossy texture. Attracts bees making it an excellent addition to pollinator gardens. Grows well with sun - mostly sun and occasional - low water. Drought tolerant once established. Prefers to be dry in summer. Adapts to various soil conditions. Does well in average, clay, gritty, lean and well-drained soil. A good option if you're seeking something heat tolerant, seaside / salt tolerant, verticillium wilt resistant and wind tolerant.

    CHARACTERISTICS OF Ceanothus 'Cynthia Postan'

    Plant type: shrub
    Plant family: rhamnaceae
    Foliage: evergreen green
    Mature size: 8 FT - 10 FT - wide, 6 FT - 8 FT - tall
    Flowers: blue blooms in spring

    GROWING CONDITIONS for Ceanothus 'Cynthia Postan'

    USDA Zones: 8a - 11
    Sun exposure: sun - mostly sun
    Watering frequency: occasional - low
    Resistant to: deer, heat, seaside / salt, verticillium wilt and wind
    Soil needs: average, clay, gritty, lean and well-drained

    Nursery contributed plant descriptions

    Promising new selection from Lady Cynthia Postan at Cambridge University, England. This ceanothus resembles the form of 'Concha' (though in our experience a slower grower) and the flowers of 'Wheeler Canyon'. The small, glossy dark-green leaves cloak upright, spreading branches and rich blue, subtly sweet blooms open from magenta buds to dust the entire shrub through the spring. Mature plants reach a manageable height and width of 6-8' making this an ideal choice for urban and suburban landscapes. Hardy to 10F.

    By: Native Sons

    Small glossy dark green leaves and medium blue flowers sweetly scented in spring. Slow growing. Handles clay soils. Hardy to 10 °F.

    By: Cactus Jungle

    Gardening facts about Ceanothus 'Cynthia Postan' plant

    How to Grow Ceanothus 'Cynthia Postan'

    • Sun Exposure

      • sun - mostly sun

    • Water Needs

      • occasional - drought tolerant

    • Water Needs

      • dry in summer

    • Soil Needs

      • clay
      • adaptable
      • average
      • lean
      • well-drained
      • gritty

    • Special Situation

      • heat tolerant
      • seaside / salt tolerant
      • wind tolerant
      • verticillium wilt resistant

    Features

    • Foliage Color

      • green

    • Flower Color

      • blue

    • Wildlife

      • bees
      • deer resistant

    • Flower Season

      • spring

    • Foliage Season

      • evergreen

    • Texture

      • glossy

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