Water Mallee
Eucalyptus dumosa
Family: Myrtaceae
What it is like
Eucalyptus dumosa is an evergreen Tree growing to 7 m (23ft) at a fast rate. See above for USDA hardiness. It is hardy to UK zone 10. It is in leaf all year. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry moist or wet soil and can tolerate drought. The plant can tolerates strong winds but not maritime exposure.
Height (m): 7
Where it is found
Desert areas.
Australia - New South Wales, South Australia, Victoria and Western Australia.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 1
A sweet manna-like substance is produced upon the leaves of the tree, it is made into a delicious drink. One report says that it is the secretion of an insect, and thus is unlikely to be produced in Britain. The bark of young roots is baked and eaten. It is said to be rather sweet, resembling malt in flavour.
Manna: this is a sweet substance that exudes naturally from certain plants, usually from the stems.
Root: includes bulbs, corms, tubers, rhizomes etc.
Medicine
Rating: 0
Other
Rating:
The leaves contain over 1% essential oil. This oil has a strong scent of camphor and is more pure than the oil of most other Eucalyptus species. The wood is too small to be used commercially. However, it is used as a fuel.
Essential: Essential oils that are used in perfumery, medicines, paint solvents, insect repellents etc.
Fuel: Usually wood, plant materials that have been mentioned as being a good fuel.
Shelterbelt: Wind resistant plants than can be grown to provide shelter in the garden etc.
Scented Plants: Plants noted for their scent
How it is grown
Prefers a sunny position in a moderately fertile well-drained moisture retentive circum-neutral soil. Tolerates poor and dry soils, especially those low in mineral elements. A drought tolerant plant once it is established, it succeeds in pure sand. This species is unlikely to be very cold-tolerant, though it might succeed outdoors in the mildest areas of Britain. Eucalyptus species have not adopted a deciduous habit and continue to grow until it is too cold for them to do so. This makes them more susceptible to damage from sudden cold snaps. If temperature fluctuations are more gradual, as in a woodland for example, the plants have the opportunity to stop growing and become dormant, thus making them more cold resistant. A deep mulch around the roots to prevent the soil from freezing also helps the trees to survive cold conditions. The members of this genus are remarkably adaptable however, there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones. Eucalyptus monocultures are an environmental disaster, they are voracious, allelopathic and encourage the worst possible attitudes to land use and conservation. Plants are shallow-rooting and, especially in windy areas, should be planted out into their permanent positions when small to ensure that they do not suffer from wind-rock. They strongly resent root disturbance and should be container grown before planting out into their permanent position. The flowers are rich in nectar and are a good bee crop. The bruised leaves have a strong smell of camphor.
Propagating it: Seed - surface sow February/March in a sunny position in a greenhouse. Species that come from high altitudes appreciate 6 - 8 weeks cold stratification at 2°c. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed, if left longer than this they might not move well. Plant out into their permanent positions in early summer and give them some protection from the cold in their first winter. The seed can also be sown in June, the young trees being planted in their final positions in late spring of the following year. The seed has a long viability.
Best place to grow: Woodland Garden Sunny Edge; Dappled Shade; Bog Garden;
Habit: Tree
Hardiness: 9-11
Growth: Fast
Soil: Light (sandy), medium, heavy (clay)
Shade: No shade
Moisture: Dry, moist, wet
Things to keep in mind
Citronellal, an essential oil found in most Eucalyptus species is reported to be mutagenic when used in isolation. In large doses, oil of eucalyptus, like so many essential oils has caused fatalities from intestinal irritation. Death is reported from ingestion of 4 - 24 ml of essential oils, but recoveries are also reported for the same amount. Symptoms include gastroenteric burning and irritation, nausea, vomiting, diarrhoea, oxygen deficiency, weakness, dizziness, stupor, difficult respiration, delirium, paralysis, convulsions, and death, usually due to respiratory failure.