Magnolia kobus
Star magnolia, Northern Japanese magnolia, Kobus magnolia
Also known as Magnolia praecocissima
- Height × spread
- 9m × 8m
- Position
- Full sun
- Hardiness
- Very cold to -20C (RHS H6)
- Flowers
- Spring, Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This beautiful magnolia may make you wait fifteen years before it starts to flower. The flowers come from downy elliptic buds in March and April. White, sometimes with a hint of pink at the petal base, they make a loose slender vase, though, with a charming informality. The tree flowers profusely, and, on a blue sky day, the site is a magical one. Beware frosts which can brown the petals. If the foliage or the twigs are bruised they release the scent of aniseed. The tree itself has a variable form since it has a wide distribution. Its shape can range from being a multi stemmed shrub to a handsome tree that can reach up to 23m (75ft) high. Usually, a more likely height is some 9m (30ft) with a spread of 8m (27ft).
- Flower colour
- White
- Foliage colour
- Green
- Autumn foliage
- Yellow
- Stem colour
- Brown, Green
- Variegated
- No
- Scent
- Yes, rich -fragrance
- Shape
- Dome
- Height
- 9m
- Spread
- 8m
- Height in 10 years
- 6m
- Spread in 10 years
- 4m
- Season of interest
- Spring
- Flowers in
- Spring, Autumn
- Evergreen
- Deciduous
- Garden style
- Scented garden
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Clay, Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Very cold to -20C (RHS H6)
- Borders & containers
- Borders
- Use for
- Screening, Architectural
- Deer
- Protect from deer when young if in vulnerable area
- Hazards
- No
Spring
Spring - late · Outdoors
Feed young plants with slow release fertiliser
Spread a slow release fertiliser around the base of the plant to the edge of the foliage spread, so that it can feed the roots. It is helpful for this to be applied for several years.
This is a simple way to provide a nutrient boost until the plant becomes well established.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Spring-Autumn · Planting
Prune to maintain young trees
While it is still possible to safely reach up and into the tree, remove dead or damaged foliage, and crossing or misplaced branches in early spring while the plant is still dormant.
Planting & general
Outdoor planting · Planting
Add root growth stimulant to the planting hole
Mycorrhizal fungi helps roots establish quickly, so they absorb water and nutrients more efficiently. It comes as a powder, granule or gel. Add to the planting hole or container, and to the plant's rootball before planting in the hole. For "bareroot" plants use a gel.
Planting
Protect & support young trees
Attach a newly planted tree or tall shrub over 1m to a tree stake to give support and prevent windrock. Use a tree guard to stop tree bark being eaten by animals, especially in areas with deer - removing bark injures a tree and in worst case can kill it.
Found in
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