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GREVILLEA excelsior 100g
Family: Proteaceae
Sub-family: Grevilleoideae
Characteristics: Tree to 6 m spread 3 m
Seed per packet: Approx. 5
Seed per gram: Approx. 25
An erect sturdy stemmed and branching small tree or large shrub with greyish green leaves 20 cm long that produces attractive large orange toothbrush-like flowers 20 cm long appearing profusely in spring.
Endemic to Western Australia.
Prefers sandy well-drained soil in an open sunny position, drought and frost resistant.
Grow notes:
Although seed can be sown most of the year in many parts of Australia seed is generally best sown in spring or autumn in temperate climates, avoid the coldest and hottest months of the year. The optimum germination temperature for germination is around 18-22°C
Larger seeds of Grevellia species can be carefully nicked with a sharp knife to expose the embryo slightly prior to sowing, this can assist with the uptake of moisture and can speed germination.
- Soak seed overnight in warm water.
- Sow seed on a porous seed raising mix and cover lightly. Do not bury the seed deeply.
- Place in a warm shaded or semi-shaded position to avoid dying out.
- The growing medium should be well draining but should remain damp between watering. Keep moist but not too wet as the seed may rot. Do not let the growing mix completely dry out.
- Germination should occur in 21-60 days depending on the temperature and conditions.
Pre-treatment of smoke: Not considered critical for this species but may be beneficial.
Many members of the Proteaceae are responsive to pre-treatment of smoke. Although germination will often occur without smoke treatment it has proved to be beneficial in reducing the number of days to germination and increasing germination rates in many species.
Smoke treatments are simple and can be undertaken either by soaking the seed overnight or by applying it to the surface after sowing, both provide good results. Smoke treatments are available by clicking here.
General note: Seeds of many natives are dormant and require specific conditions or pre-treatment for germination.
Do not be too hasty to discard seed that does not germinate, seeds will often lay dormant until the conditions are similar to their natural requirements for germination to occur. Containers put to one side will often surprise long after they have been discarded.
The best time to sow Grevillea seed is autumn or spring; avoid the hottest and coldest months of the year in cool temperate climates.
There are two main methods to assist germination.
- For larger seeds, the most usual pre-treatment method is to ‘nick’ or peel off the seed coat with a sharp blade(razer blade or shape knife to allow moisture to reach the embryo. This needs to be done with care to avoid damage to the embryo.
- For smaller seeds with thin walls, pour hot but not boiling water over the seed and allow them to soak for a day or two.
- Sow seed on a porous seed raising mix and cover lightly. Do not bury seed deeply.
- Place in a warm shaded or semi-shaded position to avoid dying out.
- The growing medium should be well-draining but should remain damp between watering.
- Keep moist but not too wet as the seed may rot. Do not let the growing mix completely dry out.
- Germination should occur in 14 days too servel months depending on the temperature and conditions.
Pre-treatment of smoke: Not considered critical for this species but may be beneficial.
Many members of the Proteaceae are responsive to pre-treatment of smoke. Although germination will often occur without smoke treatment it has proved to be beneficial in reducing the number of days to germination and increasing germination rates in many species.
Smoke treatments are simple and can be undertaken either by soaking the seed overnight or by applying it to the surface after sowing, both provide good results. Smoke treatments are available by clicking here.
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.
Our team can assist you if you require a quote for a specific project or a large domestic or export order. If you're looking for a particular item or need to make a bulk purchase, please don't hesitate to contact us at Quotes
IMPORTANT INFORMATION FOR INTERNATIONAL BUYERS:
WE NO LONGER ISSUE PHYTOSANITARY CERTIFICATES.
We can only export seeds to the following countries:
- New Zealand
- Canada
- Norway
-United Arab Emirates
-Saudia Arabia
- USA (only small lots with a Small Lot Import Permit)
- South Korea (only up to 100g lots with a South Korean Import Permit)
The purchaser is responsible for clearing the goods through their customs and paying all charges associated with clearing the goods, including any import fees and taxes if applicable. The purchaser is responsible for the clearance. Failing to do this may result in the goods being destroyed by their customs.
Australian Seed cannot accept returns due to Australian quarantine restrictions.
WE DO NOT OFFER REFUNDS ON INTERNATIONAL ORDERS
Importing to Tasmania Prohibited