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XANTHORRHOEA quadrangulata
Grass Tree or Blackboy
Family: Xanthorrhoeaceae
Sub-family: Xanthorrhoeoideae
Characteristics: Perennial monocot 1-1.5 m
Seed per packet: Approx. 15
Seed per gram: Approx 55
Grass trees are widely recognised throughout the world as being uniquely Australian.
Typically develops a rough trunk which may be branched and often coloured black as the result of surviving many bush fires. Long narrow leaves occur on the top of the trunks.
The individual flowers are white or cream and very small, clustered together in a spear-like spike which can tower 2 metres or more above the top of the trunk.
A food source for nectar-eating birds and butterflies when in flowers and seed-eating birds when the seed is developing.
Endemic to South Australia.
Prefers a light well-drained soil in an open sunny position. Drought and frost resistant.
*Image by Cillas CC BY-SA 4.0
Although seed can be sown most of the year in many parts of Australia seed is generally best sown in spring or autumn, avoid the coldest and hottest months of the year. The optimum germination temperature for germination is around 18-22°C for this species.
Xanthorrhoea germinate readily from seed with no special pre-treatment.
- Sow seed on the surface of a porous seed raising mix and cover to a depth of 1-2 mm. Do not bury seed deeply.
- Water with fine mist spray to avoid disturbance of the seed.
- Place in a warm shaded or semi-shaded position to avoid dying out.
- Keep warm & moist, avoid drying out or waterlogging the growing mix.
- Germination generally occurs in around 10-28 days in the right condition.
*Please note:
- Please do not be too hasty to discard seeds that do not germinate; seeds will often lay dormant until the conditions are similar to their natural germination requirements.
- As with all seeds, they must have adequate water to germinate; keep them moist but not too wet.
- These growth notes are provided as guidance only and do not guarantee successful germination.
- The customer should do their due diligence that they are suited to their region.
Being a registered Export Establishment, we can provide a full export service from obtaining a Phytosanitary certificate (if required) to delivering your parcel to the transport company of your choice. If you are uncertain about the requirements for importing seeds into your country, do not hesitate to contact our Export Manager at Australian Seed.
It is important to note that the buyer is responsible for clearing the goods through customs and paying all associated charges, including import fees and taxes. Please note that we cannot accept returns due to Australian quarantine restrictions.
You can find the complete International terms and conditions by clicking on this link
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Importing to Tasmania Prohibited