Lemon Queen

Scientific name: Helianthus annuus 'Lemon Queen'
Height: 1.5–2 m (5–6.5 ft)
Flower diameter: 10–12 cm (4–5 in)
Days to bloom: ~100 from sowing
Light needs: Full sun
Water needs: Moderate
Edible seed: Yes, small
Pollen-free: No, pollen present

Origin and breeder

'Lemon Queen' is an open-pollinated heirloom that has appeared in garden catalogues since the 1920s. It holds the Award of Garden Merit from the Royal Horticultural Society (RHS, 2023), making it one of the few award-winning garden sunflowers. Its widest fame comes from the Great Sunflower Project, an American citizen-science initiative launched in 2008: participants everywhere sow the same 'Lemon Queen' and count how many pollinators visit, so researchers can compare bee populations on a large scale.

How to identify it

Pale lemon-yellow ray florets — softer than the fierce yellow of most cultivars.
Branching growth with many side stems and countless flowers.
Yellow-brown centre, lighter than on coloured cultivars.
Medium heads of 10–12 cm (4–5 in).
Late, long bloom into early autumn.

Growing notes

Lemon Queen grows on ordinary garden soil in full sun and is otherwise undemanding. Because of its branching and height, the plant needs room — allow 50–60 cm (20–24 in) per plant. The cultivar offers plenty of pollen and nectar, making it a top choice for the pollinator garden; more on that under bees. The seed is edible but small, so for a serious seed harvest you would sooner choose Russian Mammoth. The basics of growing are on the page about growing.

The honest growing flaw

Lemon Queen grows very tall and branches heavily, so the plant quickly becomes top-heavy and floppy; without space and light support it lies down, especially after rain. The branching also means a staggered bloom: the flowers do not open all at once but in waves, so you never get one spectacular moment of full flower, but a messier, continuous display. Give the plant room, set it out of the wind, and deadhead spent heads to keep the bloom going. In a wet summer, watch for mildew.

Companion plants and substitutes

The soft yellow pairs well with purple and blue bloomers such as salvia, verbena or lavender, which together draw extra pollinators. If you want a darker colour contrast in the same branching form, choose Velvet Queen. For a more compact bee-friendly option without the height problem, 'Soraya' or 'Valentine' from the cultivar database are an option. The difference between branching and single-headed cultivars is on the species page.

Pick this if…

you want to feed bees and butterflies, are joining pollinator monitoring, want a long bloom into autumn, or want a soft yellow that does not shout.

Don't pick this if…

you have little space, cannot provide support, want one large show head, or want a cultivar that comes into even flower all at once.

A packet of Lemon Queen seed costs about £2 (€2). It is open-pollinated, so you can save your own harvested seed for next year.

Sources

Royal Horticultural Society (RHS) — plant guide and Award of Garden Merit, 2023.
Great Sunflower Project — citizen-science pollinator study, since 2008.