Description of Eupatorium cannabinum (Hemp Agrimony)

Eupatorium cannabinum is hemp agrimony, a UK native for damp ground and pond edges. It is valued for late summer pink flower heads that attract insects and add height without heavy foliage.

Appearance

It forms upright reddish stems with divided leaves. In late summer, domed clusters of dusty pink flowers sit above the foliage. Height is often 1 to 1.5m in good damp soil.

Care Guide

It prefers moisture and sun. In very dry soil it stays shorter and flowers less.

• Sun: Full sun to light shade.
• Soil: Moist, fertile soil.
• Water: Keep damp through the growing season.
• Cut back: Cut stems down in late winter.
• Wildlife: Leave some stems for insects over winter.

It can self-seed in open damp ground, which suits natural planting.

Suitability for Bog Garden

This suits bog gardens as a tall late-season plant at the back or sides. It works well with grasses and loosestrife in a meadow-style scheme.

Place it where height is welcome but it will not shade low growers.

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