All 89 bee plants
Sweet box pollen
Sarcococca confusa
Creamy white, in the cream / white range.
FloweringDecember to March
PollenFair
NectarGood
SeasonWinter, Spring
WhereGarden
Its winter scent draws the bees out on the mildest of days.

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.