All 89 bee plants
Hogweed pollen
Heracleum sphondylium
Dull golden yellow, in the yellow range.
FloweringJune to September
PollenGood
NectarGood
SeasonSummer, Autumn
WhereHedgerow, Waste and verge, Farmland
An honest summer standby on the verges, easily worked on a still afternoon.

Easy to mistake for these
Closest pollen colours in our set, measured the same way the pollen identifier scores a match. Colour alone will not settle it, so check the flowering months and what is actually growing near your hives.
Out at about the same time
Saw a load like this going in?
Sample the colour against all 89 plants, then keep a forage record per hive.