Woolly Clethra (Clethra lanata)

Woolly Clethra

Clethra lanata

Soft woolly foliage adds textural warmth to shaded gardens. Evergreen flowering shrub; common name: Woolly Clethra.

Partial sun
1–2/week
Moderate
🌱

Plant Needs

☀️
Sunlight Prefers partial to full shade; avoid direct midday summer sun which can scorch delicate foliage
💧
Watering Water deeply when the top 2–3 cm of soil dries out; ensure soil drains well to prevent root rot
🌡️
Temperature Tolerates mild frost down to 5°C; thrives in cool to temperate daytime temperatures
🔍

Characteristics

  • Leaf: Oval to oblong leaves with dense silvery woolly hairs on undersides; dark green, matte upper surface
  • Flower: Fragrant white to pale pink racemes of small bell-shaped blooms
  • Stem: Young stems covered in woolly pubescence; mature stems become woody and gray-brown
🛠️

Care Guide

Watering

Keep soil consistently moist; apply organic mulch to retain moisture

Fertilization

Diluted acidic organic fertilizer once monthly. Avoid high-nitrogen fertilizers which can reduce flowering

Composted coffee grounds:Mix fully composted grounds into topsoil to lower pH and add slow-release nutrients; avoid raw grounds to prevent soil acidity spikes
Pruning
  • Remove faded flower racemes in early autumn to maintain plant tidiness
  • Thin overcrowded inner branches in early spring to improve airflow and light penetration
  • Trim back leggy growth after flowering to preserve compact rounded shape
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No reported toxicity to cats

Humans: No reported toxic effects on humans

📖

Garden Uses & Culture

Culture: N/A

Usage: Ornamental shaded garden shrub; fragrant blooms attract bees and butterflies