Bergamot

Monarda didymaLamiaceaeHerbaceous perennial

A North American prairie mint whose common name in English is simply bee balm, which is a fair summary. Monarda carries shaggy whorls of tubular flowers in midsummer and is worked hard by long-tongued bumblebees — though in its native range the scarlet species is a hummingbird plant, and its long corolla tube excludes honey bees almost entirely.

Value to bees

Nectar
High
Pollen
Moderate
As a honey crop
Feeds the colony but rarely yields a surplus
Which bees, and why
Long-tongued bumblebees work it legitimately. Short-tongued bumblebees and carpenter bees frequently bite through the base of the corolla to rob it, and honey bees then use the holes. The scarlet species is a hummingbird flower in North America, which is why the tube is as long as it is.

A long narrow corolla tube that excludes honey bees and most short-tongued species by the front. The pink and purple species have shorter tubes and are more widely usable than the scarlet ones.

Worth knowing
Good nectar, and genuinely restricted by flower shape — the ratings and the accessibility note need reading together here.

Flowering

In flower
July to September (northern hemisphere)

Six to ten weeks in midsummer, in the gap after the early perennials.

When nectar flows
Generous nectar held deep in a long tube, produced steadily through the flowering.
Year-to-year variation
Reliable in a moist border and prone to mildew in a dry one. Not a crop.

Growing it

Conditions
Sun or light shade, moist fertile soil that does not dry out. Dry roots produce mildew every time.
Size
60-120 cm.
Native range
Eastern North America.
Suits
Small gardens, Large gardens, Meadow or wildflower area
  • Choose a mildew-resistant cultivar and keep it moist — dry soil is the cause of the powdery white leaves it is notorious for.
  • The purple Monarda fistulosa has a shorter tube than the scarlet species and is markedly better for bees generally.
  • Divide every three years; the centre of the clump dies out.

What it looks like

Upright square stems with strongly aromatic leaves smelling of Earl Grey tea, topped by shaggy whorled heads of long tubular flowers in scarlet, pink, purple or white.

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.

Guides covering this plant

Tools for planning planting

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