How to grow Alpine rosy bells 'Zwanenburg'
Keep in mind when planting that Zwanenburg is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Growing Zwanenburg from seed
Ensure a distance of 2.34 inches (6.0 cm) between seeds when sowing - look to sow at a depth of approximately 5.07 inches (13.0 cm).
Transplanting Zwanenburg
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Zwanenburg is a hardy plant.
Harvesting Zwanenburg