How to grow Sweet william 'Calypso Star'
Keep in mind when planting that Calypso Star is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Growing Calypso Star from seed
Transplanting Calypso Star
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Calypso Star is a hardy plant.
Harvesting Calypso Star