tree

Galaxy Magnolia

The Story

Plant Bio

A hybrid magnolia (M. liliiflora 'Nigra' x M. sprengeri 'Diva') developed by the U.S. National Arboretum, known for its large, fragrant flowers and upright, pyramidal form.

'Galaxy' is prized for its late blooming habit, which helps its flowers escape damage from late spring frosts. The flowers are a stunning deep reddish-purple and very large, up to 10 inches across.

Uses & Benefits:

Grown primarily for its spectacular floral display of huge, fragrant, reddish-purple flowers that cover the tree in mid-spring. Its upright, pyramidal form is attractive year-round.

Its relatively narrow form for a magnolia makes it a good choice for a specimen tree in medium-sized residential yards. The late bloom time is a key practical advantage in colder climates.

Magnolia flowers are an ancient lineage and are primarily pollinated by beetles, providing a food source for these insects. The tree can also offer nesting sites for birds.

Essentials

At a Glance

Plant Type

Tree

Height

360 inches

Width

240 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Medium

Humidity

Moderate

Lifespan

40-80 years

Native To

Hybrid Origin

Toxicity

Non-toxic

Bloom period

Mid-spring – Late spring

In flower about 2 months of the year

Planting

How to Grow

Select a site in full sun with rich, moist, well-drained acidic soil.
Dig a hole twice as wide as the root ball.
Amend the backfill soil with compost or peat moss.
Set the tree so the top of the root ball is slightly above grade.
Fill the hole, water thoroughly, and add a 3-inch layer of mulch.
Keep consistently moist, especially during the first few years.

Pro Tip

Plant in a location protected from strong winds to prevent damage to the large, showy flowers and ensure the best display.

Keep It Thriving

Care Guide

Do

Provide consistent moisture, especially when young and during droughts.
Mulch annually with organic matter to protect the shallow roots.
Plant in a location with good air circulation.
Choose a planting site carefully to avoid future transplanting.

Don't

Do not plant in alkaline, compacted, or poorly drained soils.
Avoid heavy pruning; magnolias heal slowly.
Do not cultivate or dig around the base of the tree.
Avoid planting in frost pockets where late frosts can damage blooms.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Stunning single specimen tree for lawnsElegant avenue or formal street treeDramatic focal point for spring interest

Companion Plants

Helleborus Narcissus Scilla siberica Brunnera macrophylla Rhododendron

Multiply

Propagation Methods

Good to Know

Common Questions

Galaxy Magnolia questions

What zones can Galaxy Magnolia grow in?

Galaxy Magnolia is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Galaxy Magnolia deer resistant?

Yes — Galaxy Magnolia is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Galaxy Magnolia bloom?

Galaxy Magnolia typically blooms in mid-spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Galaxy Magnolia need full sun?

Galaxy Magnolia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.