All 89 bee plants
Box pollen
Buxus sempervirens
Muted yellow, in the yellow range.
FloweringMarch to April
PollenGood
NectarGood
SeasonSpring
WhereGarden, Hedgerow, Woodland
The small scented spring bloom is worked well for its abundant yellow pollen.

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.
Confused with in the field
Noted by name in our own records, rather than worked out from the colour.
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.