None
14 records
No nectar at all. These plants are pollen sources — which is protein for brood rather than fuel for flight, and is the half of forage that plant lists routinely omit.
Plants by nectar value
Nectar and pollen are rated separately throughout this catalogue, and that is the point rather than a refinement. Ivy is heavy in both; poppies offer abundant pollen and no nectar at all; many double-flowered garden cultivars offer neither despite looking floriferous. A single bee-friendly score would erase all three distinctions.
5 groups · 296 records in the catalogue
Low
6 records
A little nectar. Worth having where it flowers in a month nothing else does, and not otherwise.
Moderate
38 records
A useful contribution without being a flow. Most garden perennials sit here, and a border of them supports a steady trickle rather than a crop.
High
140 records
Substantial nectar. These are the plants worth building a planting plan around.
Very high
98 records
The heaviest nectar producers in the catalogue. Borage refills within minutes of being emptied; lime and clover yield at a scale that makes honey.