Lemon Yellow Hibiscus (Hibiscus calyphyllus)

Lemon Yellow Hibiscus

Hibiscus calyphyllus

Buttery yellow blooms glow like sunlit silk, a warm addition to subtropical gardens. Deciduous flowering shrub; common name: Lemon Yellow Hibiscus.

Full sun
1–2/week
Moderate
🌱

Plant Needs

☀️
Sunlight Full sun to partial shade; tolerates mild afternoon shade in hot, arid climates to prevent leaf scorch
💧
Watering Water deeply when the top 5 cm of soil dries out; avoid standing water to prevent root rot
🌡️
Temperature Thrives in 18–30°C; tolerates light frost down to 5°C but requires protection from hard freezes
🔍

Characteristics

  • Leaf: Heart-shaped, velvety green leaves with serrated margins, up to 15 cm long
  • Flower: Large 10–15 cm wide lemon-yellow single blooms with a deep maroon central eye
  • Stem: Woody grey-brown stems with fine soft hairs on young growth
🛠️

Care Guide

Watering

Keep soil consistently moist but not waterlogged during active growth

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over flowering

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 for root drench; discard solid debris to avoid pest issues
Pruning
  • Prune dead or damaged branches in early spring to stimulate new flowering growth
  • Trim overgrown stems after flowering to maintain a compact, rounded shape
  • Remove spent blooms regularly to promote continuous flowering throughout the season
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; no harmful effects for cats

Humans: Non-toxic to humans; no known adverse effects from ingestion or contact

📖

Garden Uses & Culture

Culture: Symbolizes warmth and joyful energy in South African gardening traditions

Usage: Ornamental garden shrub; cut flowers for floral arrangements