Hemp agrimony
A tall damp-ground perennial with flat heads of dusty pink flowers in late summer, and among the most heavily insect-visited plants in northern Europe. It flowers when the meadow season is closing and is one of the best plants there is for butterflies, hoverflies and late bees together.
Value to bees
- Nectar
- Very high
- Pollen
- High
- As a honey crop
- Minor honey crop — a surplus only locally or occasionally
- Which bees, and why
- The flat head of tiny shallow florets acts as a landing platform and is accessible to almost every insect. It is one of the best butterfly plants in northern Europe and equally good for bees, hoverflies and beetles.
Flat heads of tiny shallow florets on a broad platform — the most accessible arrangement there is.
- Worth knowing
- An outstanding late-summer nectar source and one of the more productive plants in a European garden for its size.
Flowering
- In flower
- July to September (northern hemisphere)
A late summer flow, running when much of the meadow has finished.
Growing it
- Conditions
- Sun or part shade on damp to wet soil. It thrives in ground too wet for most border plants.
- Size
- 1-1.5 m tall.
- Native range
- Europe, North Africa and western Asia, on damp ground, riverbank, fen, ditch and woodland ride.
- Suits
- Large gardens, Meadow or wildflower area, Small gardens
- Excellent for a pond margin, damp border or rain garden.
- Cut back in late winter rather than autumn — the hollow stems shelter overwintering invertebrates.
- Self-seeds moderately in damp ground; deadhead if that is unwelcome.
What it looks like
A tall upright perennial with hemp-like three-lobed leaves and broad flat-topped heads of fluffy dusty-pink florets, giving a soft hazy appearance.
Sources
- Field Guide to the Bees of Great Britain and Ireland — Bloomsbury (2015) · Field guide
- Assessment Report on Pollinators, Pollination and Food Production — Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) (2016) · Systematic review Link
How sources are selected and weighted is set out in the sources and evidence policy.
Guides covering this plant
- How to make a garden genuinely useful to beesMost bee-friendly advice covers flowers in June, which is the one thing bees are least short of. The gaps are at the ends of the year — and half the problem is not flowers at all.
- The best plants for beesA shortlist chosen on three criteria: how much nectar and pollen the plant produces, how accessible it is to different bees, and when it flowers. Season coverage matters more than any individual plant.
- Summer plants for beesSummer looks abundant and contains a real gap. The weeks between the spring blossom finishing and high summer starting are thinner than most gardens realise, and colonies are at peak population when it happens.
- A bee-friendly garden in Britain and IrelandAround 270 bee species, one honey bee among them, and a climate that gives you flowering months at both ends of the year that most of the world does not get. The British gaps are February and late June, and both are fixable.
Tools for planning planting
- Flowering calendar
What should I plant so that something is always in flower for bees?
- Bee-friendly garden planner
What should I plant in the space I actually have?
- Plant recommendation tool
Which plant fills this specific gap?