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EUPHORBIA x lomi

Image of Euphorbia x lomi

James H. Schutte

Family

Euphorbiaceae

Botanical Name

EUPHORBIA x lomi

Plant Common Name

Giant Hybrid Crown-of-Thorns, Thai Crown-of-Thorns

General Description

Large flowers, compact habit and wicked thorns describe this hybrid crown-of-thorns. It is a cross between crown-of-thorns Euphorbia milii and white crown of thorns Euphorbia lophogona both from Madagascar and usually marketed as Supergrandiflora hybrids. The branches are gray to brown, covered with conical thorns and tipped with oblong, evergreen leaves. The flowers are grouped on long stalks at the ends of the branches and have two very showy bracts or modified leaves. The flower groups are reminiscent of hydrangeas. Flower color is many shades of yellow, red, peach, white, pink, lavender and multi-hued. There are hundreds of color forms developed every year.

Crown-of-thorns is a tough, tropical plant, very drought tolerant, requires full sun and will grow in average to poor soil with good drainage. It is tolerant of a few degrees of frost but will not survive prolonged freezing temperatures. In tropical zones, crown-of-thorns may be grown in mixed borders or foundation plantings. In temperate regions it is commonly grown as a houseplant, annual or in containers.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    10 - 15

  • Sunset Zone

    H1, H2, 13, 21, 22, 23, 24

  • Plant Type

    Tender Perennial

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    2'-3' / 0.6m - 0.9m

  • Width

    2'-3' / 0.6m - 0.9m

  • Bloom Time

    Indeterminate

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Pollution, Salt, Soil Compaction

  • Growth Rate

    Medium

  • Water Requirements

    Drought Tolerant

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    White, Yellow, Red, Purple, Pink, Salmon, Peach, Crimson, Dark Red

  • Flower Color Modifier

    Bicolor

  • Foliage Color (Spring)

    Green, Dark Green

  • Foliage Color (Summer)

    Green, Dark Green

  • Foliage Color (Fall)

    Green, Dark Green

  • Foliage Color (Winter)

    Green, Dark Green

  • Bark Color

    Green, Brown, Gray

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Coarse

  • Foliage Sheen

    Glossy

  • Evergreen

    Yes

  • Showy Bark

    Yes

Special Characteristics

  • Usage

    Bedding Plant, Container, Edging, Feature Plant, Houseplant, Mixed Border, Tropical

  • Sharp or Has Thorns

    Yes

  • Invasive

    No

  • Self-Sowing

    No