Xanthorrhoea glauca

grass tree
Tall grass tree grows several arms with long thin grey green leaves. Thick textured trunk over time. Slow growing, unique and rare. Excellent drainage a must.
Xanthorrhoea glaucaXanthorrhoea glauca
height 8–12ft
width 6–8ft
tolerates Cold, Drought, Pots
Water this plant infrequently, when the top two inches or so of soil feel dry. Usually this will mean every week or two in dry weather. If you establish this pattern over several years, then you can cut back to watering every four to six weeks in dry weather. Use drippers, emitters, or a slow stream of water so that it does not run off; allow the water to trickle all the way down through the deepest layers of soil. This plant will look more lush if given water every two to four weeks during dry weather once established. In a pot slowly water the entire surface until water comes out of the bottom of your pot.

This plant can also tolerate regular water in the garden, given good drainage.
exposure Part Shade – Full Sun
drainage In Ground: Cactus Mix, In Pots: Cactus Mix, Requires Perfect Drainage, Tolerates Sandy Soil
fertilizing Low Needs, No Phosphorus
origin E Australia
8, 9, 14–24

Sunset Zones Map

Outdoor Exposure Guide


Full Sun
Six or more hours of sun beams directly landing on the plant's leaves.

Part Shade
Three to five hours of sun beams directly landing on the plant's leaves.

Part Sun
One to two hours of sun beams directly landing on the plants leaves.

Full Shade
The plant is never fully lit by sun beams, but is in a bright spot or has dappled sunbeams playing over the leaves throughout the day.

Deep Shade
The plant never has dappled light on the leaves, and is in a place that feels dim, even on a nice sunny day.


Growing Notes

This plant grows a beard (accumulation of old dead leaves) on its trunk, giving it a husky look. Leave the beard as it appears in nature (until it burns off leaving a blackened trunk) or trim off the older leaves to expose a rough trunk. This plant survives fires in Australia and as such is likely to survive a forest fire here in California. Plant it as part of your fire resilient garden strategy in the urban interface.
While this plant is quite slow it sure is worth the wait and makes a stunning foliage feature in the short term. Expect a branched ‘tree’ with trunks around five feet tall in thirty to forty years.

Special Interest

Atop this handsome tree come flower spikes that add an additional ten feet!