Magnolias are one of the most loved feature trees in Australian gardens. Big glossy leaves, fragrant blooms, sculptural form, and the kind of presence that lifts a front garden into something memorable. The care advice changes a little depending on which species or cultivar you've chosen.
This guide covers how to plant, how to care for and what to expect from the most popular Magnolias we stock: Coolwyn Gloss, Little Gem, Teddy Bear, Kay Parris and the deciduous Saucer Magnolia (Magnolia x soulangeana).
How to plant your Magnolia
Magnolias prefer deep, moist, well-drained soil with a slightly acidic pH. Choose a free-draining spot for the strongest start. The planting steps:
1. Choose the position. Full sun to part shade. Shelter from drying winds helps young trees settle quickly. Cool, even light positions away from reflected heat in summer give the strongest start.
2. Dig wide, not deep. The planting hole should be twice as wide as the root ball and the same depth. Plant level for the strongest start.
3. Improve the soil. If your soil is heavy clay, mix in coarse organic matter and gypsum. If it's sandy, mix in compost to hold moisture.
4. Plant level. Position the tree so the top of the root ball sits at or just above ground level. Backfill, firm gently and water in well.
5. Mulch heavily. Apply 75 to 100mm of mulch around the root zone, keeping it a hand's width clear of the trunk for a healthy collar. Mulch is critical for Magnolias — it keeps the shallow roots cool and moist.
How tall do Magnolias grow?
It depends on the species and cultivar:
Magnolia grandiflora (full species): up to 20m and beyond in ideal conditions, though most garden specimens sit at 8 to 12m.
Magnolia grandiflora 'Coolwyn Gloss': 6 to 8m.
Magnolia grandiflora 'Kay Parris': 5 to 7m, slim upright habit.
Magnolia grandiflora 'Little Gem': 4 to 6m, compact.
Magnolia grandiflora 'Teddy Bear': 3 to 5m, compact and dense enough to hedge.
Magnolia x soulangeana (deciduous Saucer Magnolia): 6 to 8m, soft spreading habit.
If you only have room for a small block feature tree, Teddy Bear or Little Gem are the right picks. If you have room and want a big architectural feature tree, Coolwyn Gloss is the standout.
Best uses for Magnolia trees
Magnolias work as feature trees, screening, hedging or specimen plantings depending on the cultivar. Common uses:
Statement front garden feature trees: Coolwyn Gloss, Kay Parris, Saucer Magnolia.
Compact entries and small block features: Little Gem.
Formal flowering hedges: Teddy Bear (and Little Gem for taller informal screens).
Driveway plantings: Kay Parris for its slim upright form.
Pool and courtyard features: Little Gem and Teddy Bear.
Are Magnolias evergreen or deciduous?
It depends on the species. This is one of the most common areas of confusion. The Magnolia grandiflora cultivars (Coolwyn Gloss, Little Gem, Teddy Bear, Kay Parris) are evergreen and hold their glossy foliage all year. Deciduous Magnolias like Magnolia x soulangeana (Saucer Magnolia), Magnolia stellata (Star Magnolia) and Magnolia denudata drop their leaves in autumn and flower spectacularly on bare branches in early spring.
Choose evergreen if you want year round foliage and a feature that's present in winter. Choose deciduous if you want the dramatic bare-branch spring flowering moment that no evergreen Magnolia matches.
How to space Magnolias for hedging
Only the compact evergreen cultivars work as hedges. For Magnolia grandiflora 'Teddy Bear', which is the strongest hedging option:
Formal hedge: 1 to 1.5m apart.
Informal screen: 1.5 to 2m apart.
For Little Gem as a taller informal screen: 1.5 to 2m apart works well. Standard Magnolia grandiflora, Saucer Magnolia, Coolwyn Gloss and Kay Parris are feature trees rather than hedging plants and shouldn't be planted at hedging spacing.
Magnolia care: watering, mulching, pruning, feeding
Watering: deep, slow water through the first three summers while the root system establishes. Through summer, water morning and evening for the first two weeks after planting — warm soil and steady water build roots quickly. Mature trees handle dry spells with a good deep soak in extended dry weather or 30°C and above.
Mulching: apply and maintain 75 to 100mm of mulch around the root zone year round. Keep it a hand's width clear of the trunk for a healthy collar. Mulch is the single most important care step for a Magnolia.
Pruning: minimal. Magnolias don't need regular pruning. For evergreen cultivars, light shaping in late winter or after flowering is enough. For deciduous Saucer Magnolia, prune lightly after flowering in spring. Light shaping holds the natural form beautifully.
Feeding: a slow-release fertiliser in spring and again in autumn keeps growth steady and flowering strong. Use a feed formulated for acid-loving plants where available.
Final thoughts
Magnolias reward a bit of homework. Match the species and cultivar to your space and the look you want, plant deeply mulched in a position with shelter and sun, and water steadily through the first three summers. From there they look after themselves, growing into one of the most beautiful and long-lived feature trees you can plant in an Australian garden.
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