Water
Water sparingly, allowing the soil to dry out completely between waterings. Overwatering is the most common cause of root rot, especially in cooler months. Ensure excellent drainage to prevent waterlogging.
Also known as Blue Grass Tree · Grass Tree · Queensland Grasstree
Blue Grasstree (Xanthorrhoea glauca) is an iconic Australian native with striking blue-green foliage forming a dense tuft atop a woody trunk.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers full sun for best growth and form. Can tolerate partial shade but may become leggy.
Drought Tolerant
25% intensity
Allow soil to dry out completely between waterings. Reduce watering significantly in winter.
Sandy, Well-drained
50% intensity
Moderate to Warm
75% intensity
Prefers warm to hot conditions. Can tolerate light frosts once established, but protect from prolonged cold.
Low Feeds
0% intensity
Feed very sparingly, if at all. Adapted to nutrient-poor soils. Use a low-nitrogen fertilizer in spring if desired.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water sparingly, allowing the soil to dry out completely between waterings. Overwatering is the most common cause of root rot, especially in cooler months. Ensure excellent drainage to prevent waterlogging.
Pruning is generally not necessary for Xanthorrhoea glauca. Remove dead or damaged leaves by cutting them back to the trunk. Avoid cutting into the trunk itself, as this can lead to rot and disease.
Propagation is typically done by seed. Scarify seeds and sow in a well-draining, sandy mix. Germination can be slow and erratic. Division of established plants is rarely successful and not recommended.
Repotting is rarely needed as these plants grow slowly and prefer to be root-bound. If absolutely necessary, repot young plants in spring into a larger container with extremely gritty, well-draining soil.
Mature plants should ideally remain undisturbed.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Blue Grasstree (Xanthorrhoea glauca)
Where Blue Grasstree (Xanthorrhoea glauca) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Asphodelaceae |
| Genus | Xanthorrhoea |
| Species | Xanthorrhoea glauca |
Similar in genus Xanthorrhoea
Answers based on plant encyclopedia data
