Betony

Betonica officinalisLamiaceaeHerbaceous perennial

A grassland perennial with dense magenta flower spikes that was once among the most heavily used medicinal herbs in Europe and is now grown mostly by people who want bumblebees. It flowers through the midsummer gap on unimproved grassland and woodland edge, and long-tongued bumblebees work it more or less continuously while it is open.

Value to bees

Nectar
Very high
Pollen
Moderate
As a honey crop
Feeds the colony but rarely yields a surplus
Which bees, and why
Worked almost continuously by long-tongued bumblebees, and by leafcutters and wool carders. It is one of the plants most consistently recommended for the declining long-tongued species, which have fewer alternatives than short-tongued ones.

A moderately deep two-lipped tube favouring long-tongued bumblebees. Honey bees use it and less efficiently.

Worth knowing
Very high nectar over a long window, and one of the better plants for long-tongued bumblebees, which are the group in most trouble.

Flowering

In flower
June to September (northern hemisphere)

A long season through the midsummer gap, and extendable by deadheading.

When nectar flows
Steady and generous, and it keeps producing in dry weather.
Year-to-year variation
Very dependable. Not a crop.

Growing it

Conditions
Sun or light shade, well-drained soil of low to moderate fertility. It dislikes rich damp ground.
Size
30-60 cm.
Native range
Europe and western Asia, on unimproved grassland and woodland rides.
Suits
Meadow or wildflower area, Small gardens, Large gardens
  • An excellent border perennial as well as a meadow plant — it looks deliberate rather than weedy.
  • Deadhead the first flush for a second one running into September.
  • Easy from seed and slow to establish; give it two seasons before judging it.

What it looks like

A basal rosette of crinkled heart-shaped leaves with upright square stems carrying dense oblong spikes of magenta-purple two-lipped flowers.

Sources

  • Bumblebees: Behaviour, Ecology, and ConservationOxford University Press (2010) · Monograph
  • Field Guide to the Bees of Great Britain and IrelandBloomsbury (2015) · Field guide

How sources are selected and weighted is set out in the sources and evidence policy.

Tools for planning planting

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