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Author:MarioM
Source:http://commons.wikimedia.org/wiki/File:Grevillea_robusta_-_tree.jpg

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Growing Info

Scarification: Soak in hot tap water, let stand in water for 24 hours or roughen or scrape the hard seed coat prior to sowing

Stratification: none required

Germination: sow seed 3/8" deep, tamp the soil, mulch the seed bed

Other: If hot water does not allow the seed to imbibe, nick the seed carefully and soak again in warm water.|germinates best with diurnally fluctuating temperatures between 70 and 50 degrees F.

Native to: New South Wales, Queensland

Introduced to: Argentina Northeast, Assam, Bangladesh, California, Cameroon, Canary Is., Cape Verde, Comoros, Costa Rica, Cuba, Easter Is., Ecuador, El Salvador, Eritrea, Ethiopia, Florida, Gambia, Guatemala, Gulf of Guinea Is., Hawaii, India, Italy, Jawa, Kenya, Lesser Sunda Is., Marianas, Marshall Is., Mauritius, Mexico Southwest, Mozambique, New Zealand North, Norfolk Is., Pakistan, Réunion, Rwanda, Society Is., Solomon Is., St.Helena, Tanzania, Trinidad-Tobago, Venezuela, Venezuelan Antilles, Vietnam, Zaïre, Zambia

Native

Introduced

Grevillea robustaGrevillea robusta

Silkoak, Silky Oak

In Stock: 1.414 lb (Total:1.414lb)

Grevillea robusta

Quantity

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1.41 lb

Details

Germination:

91%

Germination test:

Cut (Full Seed)

Purity:

98%

Seeds per lb:

32,956

Quantity:

1.41 lb

Collected in:

India

Crop year:

2023

Min. hardiness zone:

Item ID:

1832648

Characteristics

Growing Info

Scarification: Soak in hot tap water, let stand in water for 24 hours or roughen or scrape the hard seed coat prior to sowing

Stratification: none required

Germination: sow seed 3/8" deep, tamp the soil, mulch the seed bed

Other: If hot water does not allow the seed to imbibe, nick the seed carefully and soak again in warm water.|germinates best with diurnally fluctuating temperatures between 70 and 50 degrees F.

Native to: New South Wales, Queensland

Native

Introduced

Grevillea robusta, also known as Silky Oak or Silkoak, is a fast-growing evergreen tree that can reach heights of up to 90 ft tall. This Australian native is often planted as a street tree in suitable climates and is highly ornamental, with dark green bipinnatifid fern-like leaves and one-sided, "toothbrush"-like groups of flowers. The flowers are one of the richest sources of nectar and the tree is a valuable source of timber used for external window joinery, furniture, cabinetry, and fences. While it is drought-resistant, it needs occasional watering and prefers full sun in warm zones. However, care should be taken when planting it near bushland as it can be invasive. Grevillea robusta is ideal for those looking for a fast-growing, highly ornamental tree that provides a valuable source of nectar.