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Swan River Blackbutt
Other common names: Yarri, Western Australian Blackbutt
Characteristics: Tree to 20 m
Seeds per packet: 15
A fast growing tree to 20 metres tall similar to the Jarrah Tree (Eucalyptus marginata) with rough longitudinally furrowed bark.
The Swan River Blackbutt produces creamy white flowers during the summer months but may also flower from July to August. The flowers are an excellent source of honey.
Once heavily harvested for timber much of its distribution area is now covered by conservation reserves.
Endemic to the Jarrah forests between Perth and Albany in Western Australia.
Prefers a light to medium well-drained soil in a sunny position, drought and frost resistant.
Note: The forest giants of the south Western Australia are considered to include six main species.
Corymbia calophylla (Marri) formally known as Eucalyptus calophylla
Eucalypt's germinate readily from seed and are generally considered one of the easiest natives to grow from seed.
Depending on the species Eucalyptus seed comes in various sizes from very fine to several millimetres long. As a rule of thumb seed that is fine should be sown on the surface of a porous mix and not buried. Seed 1 to 2 mm in diameter can be covered very lightly and seed from 2 mm up can be sown to a depth of the seed width.
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
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.