How to Grow Skimmia japonica 'Red Marble'

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Skimmia japonica 'Red Marble'

Skimmia japonica 'Red Marble'

shrub

Skimmia japonica 'Red Marble' is a compact, evergreen shrub prized for its attractive variegated foliage with cream and red-tinged leaves and clusters of fragrant white flowers followed by bright red berries. This Japanese native offers year-round ornamental interest and works excellently as a foundation plant, border shrub, or container specimen. It thrives in shaded woodland settings and provides winter color when many other plants are dormant.

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Example Skimmia japonica 'Red Marble' timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Skimmia japonica 'Red Marble'

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Skimmia japonica 'Red Marble'

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Skimmia japonica 'Red Marble' dates for your own zip code.

Growing Conditions

☀️
Sun: Partial shade to dappled shade, 2-4 hours of indirect sunlight daily; tolerates full shade but flowers and berries are more prolific with some light
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Water: Keep soil consistently moist but not waterlogged; water regularly during growing season (spring-summer), reduce in winter but never allow to dry out completely; mulch to retain moisture and regulate soil temperature
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Spacing: 36-48 inches
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Days to maturity: Not applicable (woody shrub); 3-5 years to reach ornamental maturity and consistent flowering/fruiting
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Planting depth: Plant at same depth as root ball; top of root ball should be level with soil surface

Soil

Type: Well-draining, humus-rich loamy or sandy loam soil
pH: 5.5-7.0
Amendments:
Peat moss or coir Compost Leaf mold Bark chips for moisture retention

Growing Zones

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Thrives in zones 6b-9b, preferring cool to moderate climates

6b 7a 7b 8a 8b 9a 9b

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Growth Stages

1

Establishment

First 1-2 years

Young plant establishes root system; compact growth with variegated foliage visible

Water regularly to keep soil moist; shelter from harsh winds and strong direct sun; apply 2-3 inches of mulch around base, keeping away from stem

2

Vegetative Growth

Year 2-3

Plant develops fuller form with increasing branching; variegated cream and red-tinged leaves become more prominent

Prune lightly after flowering to maintain shape; fertilize in early spring with balanced slow-release fertilizer; ensure consistent moisture during dry periods

3

Flowering

4-6 weeks, typically March-April

Dense clusters of small, fragrant white or pale pink flowers appear at branch tips in spring (March-April in Northern Hemisphere)

Do not deadhead if berries are desired; ensure female plants are pollinated by nearby male plants for berry set; flowers attract pollinators

4

Fruiting

August-March (persists 6+ months)

Bright red, glossy berries develop and persist on female plants through fall and winter, providing striking ornamental display

Do not prune at this stage to preserve berries; ensure adequate pollination by maintaining male plants nearby (1 male can pollinate 5-8 females); berries are toxic to humans but attractive to birds

5

Winter Dormancy

December-February

Growth slows; foliage remains evergreen and variegation becomes more pronounced; red berries provide winter interest

Reduce watering but maintain soil moisture; apply additional mulch for winter protection in colder zones; protect from harsh winds and heavy snow damage

Companion Planting

Plan your garden →

Plant with:

Avoid planting near:

Plants requiring full sun and dry conditions Shallow-rooted competitors Plants sensitive to shade competition

Common Pests

  • Inspect regularly; spray with horticultural oil or insecticidal soap in early spring when crawlers are active; prune heavily infested branches

  • Increase humidity through misting; spray with water to dislodge; use miticide if severe; ensure good air circulation

  • Remove infected leaves; improve air circulation; avoid overhead watering; apply fungicide if widespread

  • Increase air circulation; reduce humidity; spray with sulfur or fungicide; remove heavily affected growth

Uses

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Winter Interest and Screening

Ornamental

The persistent bright red berries and variegated evergreen foliage provide exceptional winter color and structural interest to gardens when other plants are dormant. Use in foundation plantings, hedgerows, or as specimen shrubs for year-round visual appeal. [source]

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Bird Food and Shelter

Wildlife

The red berries are highly attractive to birds including thrushes, blackbirds, and other wildlife seeking winter food. The dense evergreen foliage also provides excellent shelter and nesting cover. [source]

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Floral Arrangements and Cutting

Culinary

Spring flower clusters and berry-laden stems can be cut for indoor arrangements and holiday decorating, though berries are toxic if ingested. Use for dramatic dried or fresh floral designs. [source]

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Container and Shade Garden Planting

Household

The compact habit and tolerance for shade make it ideal for growing in containers on shaded patios, entryways, and along north-facing walls where few other flowering shrubs succeed. Excellent for Japanese and woodland gardens. [source]

Harvest Tips

This is an ornamental shrub—do not harvest. Enjoy berries on the plant for winter display (they are toxic to humans but safe for birds). Cut stems for indoor floral arrangements in late winter or spring when flowers are opening.

Fun Facts

  • 🌱 Skimmia japonica requires both male and female plants in the garden for berry production on females; a single male plant can pollinate up to 8 female plants at a distance of up to 50 feet.
  • 🌱 The name 'Red Marble' refers to the distinctive variegation pattern of the foliage, which resembles red marble streaking on a cream base and becomes more vibrant in cooler weather.
  • 🌱 In its native Japanese habitat, Skimmia japonica grows in woodland understories at higher elevations, explaining its preference for cool, moist, shaded conditions with protection from intense afternoon sun.

Gardening Terms

New to gardening? Learn about terms used in this guide:

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