Phytosanitary Certificates are now available for international buyers. We ship Internationally and Australia wide including Tasmania and WA.

BANKSIA robur 50 seed

Swamp Banksia

Stock: Available

SKU Code: B 18-50s


Family: Proteaceae
Characteristics: Small shrub 2 m spread 2 m

Seed per packet: 5
Sold by seed count.

A small to medium attractive shrub with large stiff leathery leaves which are the biggest in the Banksia family. The leaves are egg-shaped, broadest at the tip, 
Heads of blue-green flower buds arise from the junctions of branches and form into dense greenish-yellow flower heads 6-15 cm in length, changing to dull orange and brown with age.
The leaves are egg-shaped, broadest at the tip, shiny above, and dull on the underside 10-30 cm long and 6-10 cm wide.

Native to New South Wales and Queensland.

Prefers light to medium moist soil in a protected sunny position. Tolerates poor soils and poor drainage, frost resistant but drought tender.

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 3-4mm deep. 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 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 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 quotation prior to purchasing

Stay in touch

The latest product arrivals, inspiring garden ideas and sale alerts!