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EUCALYPTUS delegatensis

Alpine Ash

Stock: Available

$3.50

Family: Myrtaceae

Subfamily: Myrtoideae

Characteristics: Tall tree to 70 m spread 6 m

Seeds per packet: 15

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This majestic eucalypt is the largest by volume, it is not the highest, but has a solid massive trunk. The lower parts are a rough fissured grey or light tan that peels in ribbons. The branches on the upper tree are smooth and powdery white. Sickle shaped leaves 100-200 mm long and often have a strong blue tint.

White flowers appear during late summer into autumn but in the older trees they are often too high to see.

Native to southern New South Wales.

Prefers a medium to heavy soil 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 42 days is recommended for this Eucalypt. Germination may occur without stratifation but if has proved to greatly increase successful germination rates.

This is cood 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 42 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

  1. Sow seed on surface of a porous seed raising mix. The seed will lodge in the the pores of the mix once watered.
  2. 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.
  3. Water with fine mist spray to avoid disturbance of the seed.
  4. Ensure the mix is moist but not water logged.
  5. Place the ccontainer in plastic bag.
  6. Place the bagged container in the refrigerator for 42 days.
  7. Place in a warm shaded or semi shaded position to avoid dying out.
  8. Keep warm & moist, avoid drying out or waterlogging the growing mix.
  9. Germination generally occurs in 10-28 days when moved to warmer temperatures after the period of cold treatment.

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.

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