HoneyHQ

Sunflower

Helianthus annuusAsteraceaeAnnual

A single sunflower head is not one flower but hundreds of tiny individual florets, each producing its own nectar and pollen, opening in a spiral over several days. That structure makes it an unusually efficient forage platform — a bee can work a whole head without flying — and it is one of the few major farm crops that genuinely benefits from the bees as much as they benefit from it.

Caution

Double-flowered and pollen-free ornamental cultivars offer little or nothing to pollinators despite being sold as bee-friendly. This applies well beyond sunflowers — it is a general rule about heavily bred garden flowers.

Value to bees

Nectar
High
Pollen
Very high
As a honey crop
Major honey crop — yields a surplus in good years
Which bees, and why
Worked by an exceptionally wide range of bees, and in North America by a substantial community of specialist sunflower bees that visit almost nothing else.
Worth knowing
An outstanding late-summer pollen source at a point in the season when pollen is becoming scarce, which matters for colonies raising the bees that will overwinter.

Flowering

In flower
July to September (northern hemisphere)
When nectar flows
Nectar flows most strongly in warm mornings. Disc florets open progressively from the outside inwards, so a single head remains useful for a week or more.
Year-to-year variation
Cultivar choice matters enormously and is the field's central caveat: many modern oilseed hybrids have been bred for oil yield and produce markedly less nectar, and some ornamental garden varieties are bred pollen-free specifically so they do not drop pollen on tablecloths. A pollen-free sunflower is a bee desert that looks like a feast.

What it does to the honey

Produces a bright yellow honey with a straw-and-beeswax character and an unusually fast, coarse crystallisation driven by its high glucose share.

Growing it

Conditions
Full sun, fertile moisture-retentive soil, shelter from wind when tall.
Size
1-3 m, with dwarf garden varieties from 40 cm.
Native range
North America, domesticated by Indigenous peoples of the present-day United States and Mexico several thousand years ago.
Suits
Containers and window boxes, Small gardens, Large gardens, Farm scale
  • Choose a single-flowered, pollen-bearing variety. Check the packet: 'pollen-free' means exactly that, and those varieties are useless to bees.
  • Sow direct in late spring once the soil has warmed, or start under cover and plant out.
  • Leave seed heads standing over autumn and winter for finches and other birds.

What it looks like

A tall coarse annual with rough hairy leaves and a large composite flower head: sterile yellow ray florets around the edge, and hundreds of fertile disc florets in the centre arranged in interlocking spirals.

Sources

  • HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis

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

Tools for planning planting

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