Bigleaf Magnolia (Magnolia macrophylla)

Bigleaf Magnolia

Magnolia macrophylla

Its giant leaves wrap the garden in tropical calm. Deciduous flowering tree; common name: Bigleaf Magnolia.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates dappled shade in hot summer climates to prevent leaf scorch
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Watering Water deeply when the top 15–20 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Hardy to USDA zones 5–8; tolerates brief winter frosts and moderate summer heat with adequate moisture
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Characteristics

  • Leaf: Large oblong-elliptical leaves up to 90 cm long, dark green above, silvery pubescent beneath
  • Flower: Fragrant creamy-white flowers up to 30 cm in diameter with 9–12 soft tepals
  • Stem/Bark: Smooth gray-brown bark on young trees; becomes furrowed and textured with age
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Care Guide

Watering

Keep soil consistently moist during active growth; apply 5–7 cm of mulch to retain moisture

Fertilization

Apply balanced slow-release fertilizer once in early spring. Supplement with compost top-dressing in late fall to enrich soil

Banana peel compost tea:Compost banana peels for 2–3 months, steep in water for 24 hours, dilute 1:20 with water for root drenching to support flower and leaf growth
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin crowded inner branches to improve air circulation and light penetration
  • Avoid heavy pruning; preserve the tree's natural rounded canopy shape
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirms no toxicity to cats; safe for feline households

Humans: No documented toxicity to humans; safe for handling and proximity

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Garden Uses & Culture

Culture: Symbolizes dignity and quiet beauty in temperate garden traditions

Usage: Ornamental shade tree for large gardens; fragrant flowers attract bees and butterflies