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HYPOCALYMMA robustum
Swan River Myrtle
Family: Myrtaceae
Characteristics: Shrub to 0.5-1.2 m spread 1 m
Seeds per packet: 15
An ornamental shrub with small dark green leaves and a profusion of spectacular white to deep pink flowers occurring along the stem in the leaf axils in early winter to late spring in its native range.
Native to Western Australia.
Prefers a light to medium well-drained soil in a protected sunny position. Drought and frost resistant.
Seed is usually best sown in spring or autumn in temperate climates, avoid the coldest and hottest months of the year. The optimum germination temperature for germination of this genus is around 18-22°C
Pre-treatment of smoke is recommended for this species.
Research has shown that many members of this genus to be responsive to pre-treatment of smoke. Although germination will may occur without smoke treatment it has proved be beneficial in reducing the number of days to germination and increasing germination rates of this species.
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.
- Sow seed on surface of a porous seed raising mix. The seed will lodge in the the pores of the mix once watered.
- Sprinkle a very light covering of the seed raising mix over the seed if required to hold the seed in place. Do not bury seed deeply.
- Water with fine mist spray to avoid disturbance of the seed.
- Place in a warm shaded or semi shaded position to avoid dying out.
- Keep warm & moist, avoid drying out or waterlogging the growing mix.
- Germination generally occurs in around 30-60 days in the right conditions.
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.
We can only ship these items to Australian locations, international customers please request shipping quotation prior to purchasing.
Importing to Tasmania Prohibited