- Mature height
- 6m to 10m
- Mature width
- 4m to 6m
Pandanus tectorius, the screwpine, is a broad architectural tree with long strap-like leaves arranged in spirals at the ends of thick forked branches. Stilt-like prop roots grow down from the trunk and hold the plant steady in loose sand. It occurs naturally along tropical Australian coastlines and through the Pacific.
It grows 5 to 8 metres tall and 3 to 5 metres wide at roughly 30 to 60 centimetres a year. Full sun to part shade, sandy or poor free-draining soil and salt-laden wind are all fine. It is frost sensitive, so keep it to frost-free tropical, subtropical and warm coastal positions.
This is a plant for beachfront gardens, pool surrounds, resort landscapes and civic coastal projects, planted singly for drama or grouped 3 to 4 metres apart for a wall of texture. Yellow flower spikes appear in spring and summer, with ornamental fruit in the tropics. It asks for little once settled.
Frequently Asked Questions
About Screwpine
What is Pandanus tectorius?
The screwpine is a broad, branching evergreen tree with long strap-shaped leaves set in spirals at the branch tips, and thick prop roots that brace the trunk. It is not a palm, despite the look of it. The species occurs naturally on tropical Australian coasts and across the Pacific islands.
How big does a Pandanus tectorius grow?
Expect 5 to 8 metres tall and 3 to 5 metres wide at maturity, with growth of about 30 to 60 centimetres a year. The form is broad and open, built from a few heavy forked branches rather than a dense canopy, so allow room for the spread and for the prop roots at the base.
Is it frost tolerant?
No. Pandanus tectorius is frost sensitive and will be damaged or killed by frost, so it should not be planted in frost-prone areas. It belongs in tropical, subtropical and warm coastal positions. In marginal districts it can succeed in a sheltered north-facing spot near the coast, but inland frost hollows will not work.
Is it suitable for coastal positions?
It is one of the best trees for exposed coastal planting. It tolerates salt-laden wind, sand and poor, sharply drained soil, and the prop roots hold it steady in loose ground. It is regularly specified for beachfront reserves, dune edges and resort landscapes where few other trees of this size will stand up.
Is it an Australian native?
Yes. Pandanus tectorius occurs naturally along tropical and subtropical coastlines in Queensland, the Northern Territory and northern New South Wales, as well as through the Pacific islands. It is a familiar part of the northern beach landscape, which is why it sits so naturally in coastal planting schemes.
How fast does it grow?
Moderate, around 30 to 60 centimetres a year in warm conditions with adequate water. Growth slows noticeably in cooler districts and through the cooler months. Planting an advanced specimen is the usual way to get immediate presence, since the architectural character comes from the branching and prop roots, which take years to develop.
How do I care for a screwpine?
Plant in full sun to part shade in free-draining soil and water regularly through the first year while the roots take hold. After that it needs very little. Remove spent lower leaves if you want a tidier trunk, and leave the prop roots alone, as they are structural. Avoid heavy, wet clay.