Holly

Ilex aquifoliumAquifoliaceaeTree

An evergreen most people notice only in December, and a genuinely good May nectar plant the rest of the time. Holly is dioecious — male and female flowers on separate trees — so berries require both, and it supports a specialist insect almost nobody has heard of: the holly blue butterfly, whose spring generation feeds on holly and whose summer generation feeds on ivy.

Caution

Berries are toxic to people if eaten in quantity, particularly to children. Birds eat them freely.

Value to bees

Nectar
High
Pollen
Moderate
As a honey crop
Minor honey crop — a surplus only locally or occasionally
Which bees, and why
Worked steadily by honey bees and solitary bees in May. Its more interesting relationship is with the holly blue butterfly, which alternates generations between holly in spring and ivy in autumn — a two-plant life cycle that makes both plants necessary.

Small open four-petalled flowers with exposed nectar, accessible to everything.

Worth knowing
Good nectar in the late spring, and an evergreen structure that provides shelter and nesting cover the rest of the year.

Flowering

In flower
May to June (northern hemisphere)

Three to four weeks in late spring, overlapping with hawthorn.

When nectar flows
Good nectar from small scented flowers, and both male and female trees produce it — the males more heavily.
Year-to-year variation
Dependable and modest. Not a crop, but a useful component of a May multifloral.

What it does to the honey

Contributes to spring multiflorals rather than producing a monofloral. Where holly is abundant it adds a pale colour and a light clean floral note.

Growing it

Conditions
Sun or deep shade, any drained soil. One of very few good bee plants that will grow in dry shade.
Size
5-15 m.
Native range
Western and southern Europe, North Africa and southwest Asia.
Suits
Hedgerow, Large gardens, Small gardens
  • Plant a male and a female if berries are wanted. Cultivar names are a trap — 'Golden King' is female and 'Golden Queen' is male.
  • Clip in late summer rather than spring; clipping before flowering removes both the nectar and the berries.
  • Leave the berries for the birds. Blackbirds, thrushes and winter migrants strip a holly in hard weather.

What it looks like

A dense evergreen tree with glossy spine-edged leaves and clusters of small white four-petalled scented flowers in the leaf axils, followed on female trees by red berries.

Sources

  • Field Guide to the Bees of Great Britain and IrelandBloomsbury (2015) · Field guide
  • HoneyHQ editorial synthesisHEKNO Ltd · HoneyHQ synthesis

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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