← Plants

Star Magnolia

Magnolia stellata

Magnoliaceae · broadleaf · introduced

Star magnolia is the first magnolia to bloom in spring, sometimes as early as late February in the Puget Sound lowlands, opening fuzzy, silvery buds into white, many-petaled flowers that cover the bare branches like stars scattered across the winter sky. Each flower has twelve to eighteen narrow, strap-like petals radiating outward, and the display on a mature specimen in full bloom is one of the defining moments of early spring in Western Washington. Native to Japan, where it grows in mountain bogs and along streams, it develops as a large shrub or small tree, typically ten to fifteen feet tall.

Star magnolia is one of the most commonly planted ornamental trees in the region, and for good reason: it is compact enough for any residential lot, blooms young and heavily, and tolerates the moist, slightly acidic soils that characterize most lowland sites. The one risk is frost damage to open flowers, an early warm spell followed by a hard freeze can brown the petals in a single night. This is cosmetic, not structural; the tree is fine. 'Royal Star' opens later than the species, reducing frost risk, and produces more petals per flower. 'Waterlily' is another late-opening pink-budded form. No significant disease or pest concerns are tracked. For the earliest, showiest spring bloom on a tree that fits anywhere, star magnolia is the standard.

Quick Facts

Height
15–20 ft
Spread
10-15 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Well Drained
Water
Moderate
Hardiness
Zone Zones 5a–8b
Bloom Time
March
Origin
Japan, cultivated there for centuries

Phenological Calendar

Stage Typical Window
Bud break BBCH 07 Feb 15-Mar 15
Leaf emergence BBCH 11 Mar 1-Apr 1
Bloom start BBCH 61 Apr 1-Apr 30
Bloom end / petal fall BBCH 69 Apr 15-May 15
Fruit/seed development BBCH 71 Mar 15-May 31
Fruit/seed maturity BBCH 85 Jun 1-Aug 31
Leaf drop BBCH 93 Oct 15-Nov 30
Dormancy BBCH 97 Nov 15-Feb 28

Diseases (5)

Cultivars (3)

Rosea
Common name: Rosea Star Magnolia Pink Star Magnolia
Waterlily
Common name: Waterlily Magnolia; Mature height: 10–20 ft
Royal Star