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
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 |