Autumn Embers Rhododendron (Rhododendron 'Conleb' Autumn Embers)

Autumn Embers Rhododendron

Rhododendron 'Conleb' Autumn Embers

Vibrant autumn-hued blooms light up late gardens. Compact evergreen flowering shrub; common name: Autumn Embers Rhododendron.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect to partial sun; morning sun is preferred, with afternoon shade to prevent leaf scorch in hot climates
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Watering Water deeply when the top 5 cm of soil is dry; avoid waterlogging to prevent root rot in poorly drained soils
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Temperature Hardy to -15°C; protect from extreme summer heat above 30°C to prevent bloom and leaf damage
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Characteristics

  • Leaf: Small, glossy dark green evergreen leaves, oval-shaped with leathery texture
  • Flower: Trumpet-shaped blooms in fiery orange-red to deep amber hues, clustered in dense trusses
  • Stem: Slender woody stems with brownish bark, forming tight mounding growth
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Care Guide

Watering

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

Fertilization

Apply acid-loving plant fertilizer every 6 weeks. Use slow-release acidic fertilizer to maintain optimal soil pH levels

Coffee grounds compost tea:Use only fully composted coffee grounds to avoid mold or odor; dilute 1:20 with water for root drenching to maintain acidic soil conditions
Pruning
  • Remove spent flower trusses after blooming to encourage new growth and maintain compact shape
  • Thin overcrowded branches in late winter to improve airflow and reduce fungal disease risk
  • Trim back leggy stems in early spring to preserve the mounding habit
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-confirmed toxic; ingestion leads to vomiting, diarrhea, weakness, and potential cardiac issues

Humans: Contains grayanotoxins; ingestion causes nausea, vomiting, and irregular heartbeat in severe cases

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Garden Uses & Culture

Culture: Symbolizes caution due to inherent toxicity; prized for extending garden color into late autumn

Usage: Ornamental garden shrub, container planting for patio displays