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Eucalyptus incrassata

Yellow Mallee
(also known as Eucalyptus costata)

Species Description

This link will give you an image of the species as a mature plant, as well as flower, fruit and seed description.

Species description

Cultivation and Uses

This link will give you information about climate parameters, tolerance of climate extremes and adverse soils, biological traits under cultivation, soil factors, uses and potentially undesirable attributes.

Cultivation and uses

Plant Growing Stages


2 Months

4 Months

6 Months


Seed Description

Seed is very fine and brown / black/tan/ orange

Seed Pre-Treatment


Surface sow, cover lightly with gravel.


Water under leaf structure in winter to avoid powdery mildew.


Germination usually occurs within 2-6 weeks.
Light required for germination.

Pests and Disease

Prone to Powdery Mildew in winter.
Myrtle rust may affect this species.
Species susceptible to Cinnamon fungus (Phytophthora cinnamomi) dieback.

When to Sow Seeds / Temperature to Sow

Optimal germination temperature 22°C.

Seed Collection Timeframe

Year Round
Seed rippens 2 years after grown

Storage and Ripening

Seed may retain viability for 4-5 years stored at room temperature.

Grows from Cuttings