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PlantFiles: Red River Gum
Eucalyptus camaldulensis

Family: Myrtaceae (mir-TAY-see-ee) (Info)
Genus: Eucalyptus (yoo-kuh-LIP-tus) (Info)
Species: camaldulensis

Synonym:Eucalyptus rostrata

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over 40 ft. (12 m)

30-40 ft. (9-12 m)
over 40 ft. (12 m)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Unknown - Tell us


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow after last frost

Seed Collecting:
Unknown - Tell us

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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive trugger On Jan 13, 2005, trugger from Mackay
Australia wrote:

E. camaldulensis grow naturally along watercourses in both the creek bed and on flood plains. As Australia where they come from is a dry continent, they have evolved to survive through droughts and floods. They do this by the strategy of sending down deep roots to permanent water tables up to ten metres underground for drought survival. Their seeding is tuned to the wet season of their locality so that the seed when dropped will be in ideal conditions. Wet seasons often flood the area for months at a time and River Red Gums can be seen thriving waist deep in water throught this time without any harm. Other species drown in these conditions.

Growing them in forestry conditions is never a complete success away from flood plains that are annually inundated. Though, because of the water that is stored underground, they will survive droughts up to a decade long.

They are reasonably salt tolerant and are useful in reclaiming salt outbreaks in cleared areas. Their deep roots help in keeping the water table down low so that salt is not brought to the surface but leached back deep underground where it came from initially.

Planted as single specimens they form a wide, medium density of crown and rarely achieve over 15 metres. Planted in close forestry spacings of 4 x 2.5 m (1000 trees per hectare) they will achieve up to 25 metres plus. Though this only after thinning out twice over 15 years to a plant density of 200 to 300 trees per hectare (100 x 100 m).

Very old trees almost always have hollow trunks and branches which are nesting places for many birds and mammals such as parrots, owls and possums.


This plant has been said to grow in the following regions:

Phoenix, Arizona
Superior, Arizona

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