GardenWizzPlant Care Card

Magnolia

Magnolia grandiflora · Tree

Hardiness
H5 Hardy — cold winter (to −10 to −15°C)
Position
Full sun
Height × Spread
12–37 m × —
Soil
Moist, well-drained, slightly acidic or neutral soil.
Flowering
June–August
Toxicity
No specific toxicity is listed by the RHS. This is not a guarantee of safety — check with a vet or the ASPCA before pets or children eat any plant.

The Gardening Year

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🌸 In flower

Watch out for

Horse chestnut scale: Scrape off heavy infestations or spray with horticultural oil during the dormant season.

Coral spot: Prune out affected wood in dry weather and improve air circulation around the plant.

Phytophthora root rot: Ensure well-drained soil and avoid overwatering; remove severely infected plants.

Capsid bug damage: Monitor for pests in spring and treat with insecticidal soap if populations are high.

Grey mould: Remove infected material immediately and ensure good air circulation to reduce humidity.

Full guide: gardenwizz.com/plants/magnolia © GardenWizz — UK gardening encyclopedia