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Other details: May be a noxious weed or invasive Average Water Needs; Water regularly; do not overwater Requires consistently moist soil; do not let dry out between waterings Very high moisture needs; suitable for bogs and water gardens
On Mar 8, 2005, saya from Heerlen Netherlands (Zone 8b) wrote:
An aromatic branched perennial to 1 m tall. The leaves are deeply pinnate and the undersurface is covered with pale yellow glandular hairs. Flowers in summer. Found in disturbed wetland sites between Perth and Bunbury. Native to South America. (Source: Plant Protection Society of WA)