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Characteristics: Tall tree to 100 m spread 7 m
Seeds per packet: 15
Mountain ash is the tallest hardwood tree in the world with specimens reaching 100 metres or more in height. Only the softwood Californian redwoods (Sequoia sempervirens) are taller, one of these having been recorded at about 113 metres.
It is believed that specimens of Ecalyptus regnans felled during the 1800s may have reached more than 140 metres making the species the tallest tree ever recorded on earth in historic times.
The tall trunk is smooth except for the lower few metres where the bark is retained. The trunk is white or grey in colour.
Diamond shaped green peaked flower buds occur in groups of 7-16 opening the creamy white flowers in summer. Eucalyptus regnans is the tallest flowering plant in the world.
Prefers deep moist loams in a protected sunny position, frost resistant but drought tender.
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.
Cold stratification of 21 days is recommended for this Eucalypt.
This is cool mountain species of Eucalypt that in its native range has a cold winter prior to germinating in spring. This can be replicated by cold stratification in the refrigerator for 28 days. Alternatively over wintering in the garden in cold climates will assist germination.
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 16-22°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.