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Black Eyed Susan

Tetratheca hirsuta

Black Eyed Susan
Photo: Gnangarra, CC BY 2.5 au

Tetratheca hirsuta is a small Western Australian shrub with pink to purple flowers, native to the south-west of the state and rarely grown. It suits rockeries and needs acidic soil and sun to part shade.

Family
Elaeocarpaceae (Elaeocarp family)
Grows as
Shrub
Light
Full sun, Part shade
Water
Water moderately while establishing, then allow the soil to dry between waterings; avoid waterlogging.
Soil
Acidic, free-draining gravelly or lateritic mix.
Temperature
10–30 °C; protect from hard frost.
How easy
Moderate
Native range
WSW. & SW. Western Australia
Climate
subtropical

About

Tetratheca hirsuta, commonly known as black-eyed Susan, is a small shrub in the family Elaeocarpaceae. Endemic to the south-west of Western Australia, it is not related to other plants known as black-eyed Susan around the world.

How to grow it

First cultivated in England in 1843 (as T. rubriseta), Tetratheca hirsuta is rarely cultivated but has horticultural potential, for rockeries. It prefers acidic soils and sunny or part-shaded aspect. Pruning stems to just above ground level can rejuvenate the plant.

Where it grows

Tetratheca hirsuta is found on lateritic gravelly soils in open woodland and heath in southwestern Western Australia, in the Darling, Avon and western Eyre districts.

Other Tetratheca plants

Tetratheca affinis · Tetratheca aphylla · Mountain Pink Bells · Pink Bells · Tetratheca confertifolia · Tetratheca decora · Tetratheca deltoidea · Tetratheca efoliata · Tetratheca ericifolia · Tetratheca erubescens · Tetratheca exasperata · Tetratheca fasciculata

Text excerpted from the Wikipedia article Tetratheca hirsuta by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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