Herb Robert
Geranium robertianum
- Flowering period
- May–October
- Nectar
- mäßig
- Pollen
- mäßig
- Other names
- Stinking Crane's-bill
Herb Robert flowers from May to October and provides moderate nectar with moderate pollen value. It is annual to biennial and grows on walls, in hedges, on rubble and in shady gardens. When crushed it smells rank, hence its second name, stinking crane's-bill. Because of its long flowering period it is a steady supplementary forage in partial shade. British measurements give around 98 micrograms of sugar per flower per day, around 2,484 pollen grains per flower and a nectar yield of around 12 kilograms of sugar per hectare per year.
Sources (7)
- Trachtpflanzen-Katalog Bienenroute: Ruprechtskraut
- Ruprechtskraut, Pflanzensteckbrief bei Die Honigmacher (Deutscher Imkerbund)
- Bienenweidepflanzen für den Hausgarten, Bayerische Landesanstalt für Weinbau und Gartenbau (LWG) Veitshöchheim
- Geranium robertianum, 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