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Rhododendron( Carolinianum Group)

Image of Rhododendron (Carolinianum Group)

Family

Ericaceae

Botanical Name

Rhododendron( Carolinianum Group)

Plant Common Name

Carolinianum Rhododendron

General Description

A parent of many well-known cultivars (including the PJM hybrids), these small to medium-sized rhododendrons are outstanding ornamental plants in their own right. They are selections of a distinct race of Rhododendron minus var. minus from the the mountains of western North Carolina. These evergreen shrubs bear rounded trusses of rosy purple, pink, or white flowers from early to mid-spring. The wide-flaring funnel-shaped blooms often have a contrasting greenish-yellow blotch on their upper lobe. The upright, dense to open plants have medium-sized oval deep green leaves with rust-brown undersides. The leaves roll up tight in severe cold or drought.

Like most rhododendrons, members of the Carolinianum Group favor chilly winters, moderate summers, partial shade, and well-drained, humus-rich, acid soil. Plant them shallowly and mulch well to conserve moisture and suppress weeds. Do any necessary pruning directly after the flowers fade, before new flower buds form. These plants work beautifully in shrub borders, foundation plantings, and natrualistic woodland gardens. Try to site them where they have room to grow to full size.

Characteristics

  • AHS Heat Zone

    8 - 1

  • USDA Hardiness Zone

    5 - 8

  • Sunset Zone

    4, 5, 6, 15, 16, 17

  • Plant Type

    Broadleaf Evergreen

  • Sun Exposure

    Partial Sun, Partial Shade

  • Height

    4'-6' / 1.2m - 1.8m

  • Width

    4'-6' / 1.2m - 1.8m

  • Bloom Time

    Early Spring, Spring

  • Native To

    Southeastern United States

Growing Conditions

  • Soil pH

    Acidic

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Oval/Rounded

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    White, Purple, Pink, Rose

  • Fruit Color

    Brown

  • Foliage Color (Spring)

    Green, Dark Green

  • Foliage Color (Summer)

    Dark Green

  • Foliage Color (Fall)

    Dark Green

  • Foliage Color (Winter)

    Dark Green

  • Bark Color

    Brown, Gray

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Glossy

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Bark Texture

    Smooth

  • Usage

    Feature Plant, Foundation, Hedges, Mixed Border, Topiary / Bonsai / Espalier

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    Yes