The Story
Plant Bio
Alyxia buxifolia, the sea box, is a dense, rigid evergreen shrub native to coastal southern Australia, typically reaching four to ten feet in height with a spreading, compact habit. The thick, leathery leaves are dark glossy green above and pale beneath, arranged in opposite pairs or whorls of three along stiff branches.
Small, star-shaped white flowers with distinct orange tubes appear from spring through fall, followed by toxic, bright orange-to-red fleshy drupes. The species is highly resilient to salt spray and shearing winds, making it an exceptional choice for exposed coastal windbreaks or structured hedges.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Shrub
Height
118"
Width
142"
Light
Full Sun, Partial Sun
Zones
9, 10
Water
Low
Humidity
Low to Moderate
Lifespan
Long-lived
Native To
Australia
Toxicity
Toxic to humans
Bloom period
Spring – Fall
In flower about 9 months of the year
Planting
How to Grow
- Select a site with full sun to partial shade and exceptionally well-drained soil.
- Dig a planting hole twice the width of the root ball but equal in depth.
- Backfill with native soil, avoiding the addition of rich organic matter or acidic soil amendments.
- Water deeply to settle the soil, then apply a light layer of mulch to retain moisture while the roots establish.
Pro Tip
Avoid cutting back severely into old, leafless wood, as recovery is slow and patchy; instead, perform light, regular tip-pruning to maintain a dense, formal shape.
Keep It Thriving
Care Guide
Do
- Grow in neutral to alkaline soils, including sandy or heavy clay types, provided drainage is sharp.
- Prune regularly to maintain a compact, formal hedge or windbreak.
- Protect young plants from severe, prolonged freezes during their first winter.
Don't
- Do not overwater, as waterlogged soil is the primary cause of root rot and plant failure.
- Do not prune heavily into old, bare wood.
- Do not plant where children or pets might ingest the toxic orange-red fruits.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Sea Box questions
What zones can Sea Box grow in?
Sea Box is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
When does Sea Box bloom?
Sea Box typically blooms in spring through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Sea Box need full sun?
Sea Box does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Sea Box drought tolerant?
Yes — once established (usually after the first full season), Sea Box handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
Keep exploring
Explore the genus
Hardy in your zone?
Grow Sea Box with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.