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Banksia seminuda is a fast-growing tree with spectacular 15 cm yellow-orange flower candles in the autumn. Flowers are produced fairly deep in the foliage on the second year’s growth.
The River Banksia can grow to 20 metres but is generally smaller in cultivation.
Endemic to the southwest corner of Western Australia.
Prefers light well-drained soil in an open sunny position, avoid waterlogged soils. Drought tolerant but frost tender when young.
The best time to sow Banksia seeds is autumn or spring. Sow in contains and transplant when they are big enough to handle.
The growing medium should be well draining but should remain damp between watering. Banksia dislikes wet roots, so don't overwater them, or they will rot.
Sow the seed flat around 5mm deep. Vermiculite is an excellent medium to cover the surface as it helps retain moisture and controls the temperature.
Germination should occur in 14-40 days at 20-25°C
Pre-germination of seeds by sowing into a closed container containing moist vermiculite or similar material is also helpful for germinating seeds, particularly for winter sowing when outdoor temperatures may be unsuitable. Germination usually occurs in 1-2 weeks using this method, and when the root has reached about a centimetre or so in length, the seedling can be placed into a small pot of seed-raising mix.
Pre-treatment of smoke is not critical to the germination of this species. However, many members of the Proteaceae family are responsive to the pre-treatment of smoke.
Smoke treatments are simple and can be undertaken by soaking the seed overnight or applying it to the surface after sowing; both provide good results.
Smoke treatments are available by clicking here.
*Please note:
As 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, please contact us.
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. One of our team members will get back to you as soon as possible.