Harebell
Campanula rotundifolia
- Flowering period
- June–September
- Nectar
- mäßig
- Pollen
- mäßig
The harebell flowers from June to September and provides moderate nectar with moderate pollen value. It is a delicate perennial of poor meadows, banks and rock ledges. Its hanging blue bells protect the pollen from rain. On poor grassland it yields throughout the summer and is a food source for specialised wild bees. British measurements give around 290 micrograms of sugar per flower per day, around 18,709 pollen grains per flower and a nectar yield of around 90 kilograms of sugar per hectare per year.
Sources (7)
- Trachtpflanzen-Katalog Bienenroute: Rundblättrige Glockenblume
- Bienenweidepflanzen für den Hausgarten, Bayerische Landesanstalt für Weinbau und Gartenbau (LWG) Veitshöchheim
- Campanula rotundifolia, Wikipedia
- Campanula rotundifolia, Euro+Med PlantBase über PESI
- Filipiak, Walczyńska, Denisow, Petanidou, Ziółkowska (2022): Phenology and production of pollen, nectar and sugar in 1612 plant species from various environments
- Baude, Kunin, Memmott (2015): Nectar sugar values of common British plant species [AgriLand]
- Baude, Kunin, Davies, Wright, Memmott (2025): Pollen production values of common British plant species