Autumn Moonlight Rhododendron (Rhododendron 'Mootum' Autumn Moonlight)

Autumn Moonlight Rhododendron

Rhododendron 'Mootum' Autumn Moonlight

Its golden foliage glows through seasons, a warm contrast to pink blooms. Evergreen flowering shrub; common name: Autumn Moonlight Rhododendron.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright partial shade; avoid intense midday sun to prevent leaf scorch and variegation fade
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Watering Keep soil consistently moist but well-drained; avoid waterlogging to prevent root rot
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Temperature Hardy to -15°C; protect from extreme summer heat above 28°C to preserve foliage color
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Characteristics

  • Leaf: Small, elliptical leaves with golden-yellow variegation, turning bronze in winter
  • Flower: Clusters of pale pink, funnel-shaped blooms with subtle yellow throats
  • Stem: Slender, woody stems with smooth, light brown bark
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Care Guide

Watering

Keep soil evenly moist; apply mulch to retain moisture and regulate soil temperature

Fertilization

Acidic diluted feed every 2 weeks. Use acid-specific fertilizer to maintain soil pH and support foliage and bloom development

Composted pine needle tea:Steep fully composted pine needles in water for 24 hours; dilute 1:20 for root drench to maintain acidic soil conditions without introducing pests or odors
Pruning
  • Deadhead spent blooms after flowering to redirect energy to new growth
  • Thin overcrowded branches in late spring to improve airflow and reduce disease risk
  • Remove damaged or diseased stems in early spring before new growth emerges
  • Shape lightly to maintain compact mounding habit; avoid heavy pruning that removes woody growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Highly toxic; ingestion leads to vomiting, weakness, and potentially fatal cardiac issues

Humans: Contains grayanotoxins; ingestion causes oral irritation, nausea, and cardiac irregularities

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden shrub; container planting for patios and entryways