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Denbigh (Dinbych) is a market town in the Vale of Clwyd, built on a limestone hillock dominated by the medieval castle and town walls. The castle grounds and the steep slope gardens below hold established ivy, cotoneaster and bramble that extend the forage season at both ends of the year. The Vale of Clwyd below the town is prime agricultural land carrying white clover, field beans and, in April, oil-seed rape. The hillsides above Denbigh to the east carry rough grazing with hawthorn and blackthorn scrub in the field boundaries and gorse on the rough ground approaching the Clwydian ridge. Sycamore lines every roadside; riverside alders in the vale add early pollen from February.

Sycamore provides the dominant May flow county-wide, heaviest along roadsides and in valley-side woodland. The Vale of Clwyd is prime agricultural land producing a strong white clover and field-bean flow through June and July; oil-seed rape on the river-plain fields gives an early April flow in good years. Hawthorn and blackthorn on the Clwydian Range provides the classic late-April blossom flow. The upland fringe above 300 metres carries heather and gorse on the Berwyn and Llantysilio mountains, giving apiaries at Corwen and Ruthin access to a July-to-September upland flow. Sea buckthorn on the Gronant and Foryd dunes provides pollen late into the season; ivy closes the calendar in October across the county.