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BANKSIA rosserae - Rosser's Banksia

Conservation code: Priority 1
Poorly-known species

Stock: Out Of Stock

SKU Code: B 76

Family: Proteaceae
Characteristics: Small tree 3-5

Seed per packet: 5
Sold by seed count.

A recently discovered Banksia was found only in a limited range around Mount Magnet in Western Australia. Found in the year 2000 it was only formally named in 2002. It was not until 2006 before the first flowering was observed.

A medium-sized shrub with attractive greenish-yellow flowers in bud changing to lemon yellow when mature that occur generally from July to October.
Occurs naturally over a limited area of arid lands and has the potential to become an ideal species for drier climates.

Conservation code:
Priority 1: Poorly-known species
Species that are known from one or a few locations (generally five or less) which are potentially at risk. All occurrences are either: very small; or on lands not managed for conservation, e.g. agricultural or pastoral lands, urban areas, road and rail reserves, gravel reserves and active mineral leases; or otherwise under threat of habitat destruction or degradation. Species may be included if they are comparatively well known from one or more locations but do not meet adequacy of survey requirements and appear to be under immediate threat from known threatening processes. Such species are in urgent need of further survey.

Prefers deep well-drained sandy soil in an open sunny position. Avoid waterlogged soils. 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

  1. The growing medium should be well-draining but should remain damp between watering.
  2. Sow the seed the depth on the seed size. Vermiculite is a good medium to use to cover the surface as it helps retain moisture and controls the temperature. 
  3. Keep moist but not too wet as the seed may rot. Do not let the growing mix completely dry out. 
  4. Germination should occur in 21-60 days depending on the temperature and conditions. 

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 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 were discarded.

We now stock a range of Propagation Accessories including the popular Aquamiser Propagation Kits, Pots, Native and Forestry Tubes, Trays, Labels, and more.

Click here to view our range.

We can only ship these items to Australian locations, international customers please request shipping quote prior to purchasing.

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