Trees & Shrubs Weed profiles & Native alternatives
I’M A WEED
Dog Rose / Briar Rose
Rosa canina / R. rubiginosa
Variable, deciduous, spiny, scrambling shrub 1-5 m high. Stems are covered with small, sharp, hooked spines, and leaves have 5-7 leaflets. Flowers are usually pale pink, but can vary from deep pink to white. They are 4-6 cm in diameter with five petals, and mature into an oval 1.5-2 cm red-orange fruit.
Threat / Problem
• Can form dense impenetrable thickets which out-compete native vegetation and reduce bushland biodiversity.
• Chemicals in the seed inhibit the germination of native plants.
• Provides harbour for foxes and rabbits.
• Spread by water and movement of soil, and by birds and foxes that feed on the fruit.
• Best in Spring, before flowering and seed set. Hand pulling effective for small plants, herbicide spray for larger plants.
GROW ME INSTEAD
The Native Hibiscus is distantly related to the hibiscus. A fast growing shrub to 2.5 m high. Bright green leaves are deeply lobed, up to 7 cm long. The flowers, usually mauve to purple, sometimes white, are large (up to 12 cm in diameter) and have five, slightly overlapping petals. Flowers continue to open throughout summer and autumn. Drought tolerant, prefers full sun and grows well in a range of soils with good drainage. Responds well to late winter pruning. Regular pruning will stop it becoming too leggy.
Found in understorey of coastal and inland mallee.
OR GROW ME
Erect, much-branched, aromatic shrub normally 1-2 m high with dense foliage and covered in fine white hairs which give the shrub a silvery colour. Leaves are about 1.2 cm long by 0.1-0.3 cm wide, linear, with a margin that rolls under.
Flowers are small white daisies, usually in Autumn. Prefers open sun in well-drained areas. Tolerant of strong winds, salt, and poor soils, it is common in exposed coastal sand dunes.
Responds well to pruning. Considered a pest species by farmers.
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