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Characteristics: Spreading shrub to 1.8 to 4 m
Seeds per packet: 5
Banksia benthamiana is a non-lignotuberous shrub with serrated leaves 10-25 cm long which are densely covered in hairs when young.
Yellow-orange to orange-brown flowers 5-10 cm tall occur during late spring and early summer.
Endemic to the Eremaean Province and South-West Province of Western Australia in the Avon Wheatbelt and Yalgoo regions.
Prefers a well-drained soil in an open sunny position. Avoid waterlogged soils.
Although seed can be sown most of the year in 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
Pre-treatment of smoke: Not considered critical to germination of this species and germination will generally occur without it.
However many members of the Proteaceae family 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 of the Proteaceae family.
Smoke treatments are simple and can be undertaken either by soaking the seed overnight or by applying to the surface after sowing, both provide good results. Smoke treatments 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 were discarded.