Star Magnolia Care
Magnolia stellata
A slow-growing, compact, deciduous small tree of Japanese origin. It is known for its abundant, fragrant, star-shaped flowers that open very early in spring before the leaves appear. It prefers sunny or partially shaded, moist, well-drained and slightly acidic soils.
Monthly care calendar
Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.
- Pruning: Not needed. Only remove broken branches; avoid pruning because it is too close to the flower buds.
- Plant protection: Dormant oil can be applied against overwintering scale insects (Coccoidea).
- General care: Dormancy period.
- Pests & diseases: Check the trunk and branches for scale insects.
- Frost risk: The tree is hardy, but flower buds are very sensitive.
- General care: Flower buds are very close to opening and may bloom toward the end of the month.
- Frost risk: It is the riskiest month for flowers. Opening flowers are damaged even by the lightest frost.
- Watering: If the soil is dry, 10-15 L/week.
- Fertilizing: After flowering ends, apply an acidic, slow-release fertilizer (e.g., rhododendron fertilizer) or compost, to the soil, 30-50 g/m²; do not overapply.
- Pruning: The best time for pruning is as soon as flowering ends. It needs very little pruning; only remove misshapen and dead branches.
- General care: Usually begins flowering early in the month.
- Pests & diseases: Frosted flowers turn brown.
- Frost risk: Late frosts can damage flowers.
- Watering: If there is no rainfall, water every 15 days.
- Fertilizing: If it was not fertilized in March, it can be done at the beginning of the month.
- Pruning: The last chance for pruning is the beginning of the month.
- Plant protection: If aphids are seen on the new leaves, apply neem oil.
- General care: Leafing out begins; spread mulch (pine bark, etc.) over the root zone.
- Pests & diseases: If yellowing (chlorosis) begins on the leaves, apply iron chelate.
- Watering: If there is no rainfall, water once a week.
- Fertilizing: If chlorosis continues, give an iron supplement.
- Plant protection: If leaf spot diseases or powdery mildew are seen, use a suitable fungicide.
- General care: Spread a 5-7 cm layer of mulch over the root zone; it retains soil moisture and suppresses weeds. Do not pile mulch against the trunk.
- Pests & diseases: Watch for powdery mildew (Erysiphales) and leaf spots.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
- Pruning: Not done; next year's buds are forming.
- General care: Mulch and regular watering are important to keep the roots cool and moist.
- Pests & diseases: Check for scale insects and spider mites (Tetranychidae).
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
- Pruning: Prune as soon as flowering ends. Next year's flower buds form over the summer; late pruning reduces flowering.
- General care: Keep it in a position sheltered from midday sun; scorching at the leaf edges is a sign of burn.
- Pests & diseases: Drying of the leaf edges is a sign of water stress.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
- General care: Be careful about water stress at high temperatures.
- Watering: If there is no rainfall, water once a week.
- General care: A suitable time for autumn planting.
- Watering: If there is no rainfall, water every 15 days.
- General care: The leaves begin to color and fall. Clear the fallen diseased leaves.
- Pests & diseases: If there has been powdery mildew in the past, collect and destroy all fallen leaves.
- General care: Collect fallen leaves; many disease agents and pests overwinter under leaves.
- Frost risk: Young saplings must be protected from winter frosts.
- Plant protection: Prepare for dormant oil application if needed.
- General care: Full dormancy period.
- Frost risk: Young saplings should be protected in severe frosts; mature trees are hardy.
The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.
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