Saucer magnolia
Also known as
Tulip magnolia, Soulangeana magnolia, Cup-and-saucer magnolia, Chinese magnolia
Keep this plant’s care guide close at hand.
Get the appAbout Saucer magnolia
Magnolia × soulangeana, the saucer magnolia, is a deciduous small tree or large multi-stemmed shrub celebrated for its dramatic early-spring bloom. A cross between Magnolia denudata and M. liliiflora, it typically reaches 4–8 m (15–25 ft) tall with a broad, rounded crown and smooth gray bark. In late winter to early spring, before leaves emerge, goblet-to-saucer-shaped flowers 10–25 cm (4–10 in) across open in shades of white, blush, pink, or rosy purple, often with a light fragrance. Leaves are obovate, 10–20 cm long, medium green, and turn yellow-bronze in fall. It prefers deep, well-drained, slightly acidic, humus-rich soils with consistent moisture and benefits from a protective mulch. The root system is shallow and easily disturbed, so site carefully and avoid heavy pruning. While generally tough, flowers are vulnerable to late frosts, so a sheltered position helps preserve the display. Pests are usually minor (scale insects, aphids), though chlorosis can develop on alkaline soils. Widely planted as a specimen in gardens and parks, it offers spectacular seasonal interest and a graceful, architectural form.
Taxonomy
Properties & Requirements
How to care for Saucer magnolia
Water
Water newly planted trees deeply 1–2 times per week during the first two growing seasons, delivering 10–20 liters (2–5 gallons) each time depending on soil and weather. Aim for even moisture, letting the top few centimeters of soil dry slightly between soakings. Established plants need about 2.5 cm (1 in) of water weekly in active growth; increase during heat or drought. Use a slow trickle or soaker hose out to the dripline, and avoid waterlogging or compacted, poorly drained soils.
Light
Best bloom occurs in full sun, but Magnolia × soulangeana grows well in light or dappled shade. Provide at least 6 hours of direct sun in cool-summer regions. In hotter climates, morning sun with light afternoon shade helps preserve flower color and reduces leaf scorch. Avoid deep shade, which limits flowering and promotes lanky growth, and avoid highly reflective heat (pavement, south-facing walls). Shelter from strong winds to protect the large, delicate flowers.
Nutrients
Magnolia × soulangeana is a light to moderate feeder. Incorporate compost or leaf mold at planting and maintain a 5–8 cm organic mulch. In early spring, before or just as growth begins, apply a slow-release, balanced or slightly acid-forming fertilizer (e.g., 10-5-10 or azalea/camellia blends) at label rates. Avoid high-nitrogen spikes and do not fertilize after midsummer to prevent tender growth. On alkaline soils, address pH, add organic matter, and use chelated iron if chlorosis appears.
Temperature
Generally hardy in USDA Zones 5–9 (some cultivars tolerate Zone 4). Dormant wood is hardy, but flower buds open very early and are easily damaged by late spring frosts. Plant where there is good air drainage yet shelter from cold winds; avoid south-facing walls that force premature bloom. Mulch roots to buffer soil temperatures. In hot-summer climates, provide afternoon shade and steady moisture to reduce heat stress and preserve flower quality.
