How to grow Sweet william 'Whatfield Supergem'
Whatfield Supergem is generally regarded as a hardy plant, so this plant will survive close to or on freezing temperatures.
Growing Whatfield Supergem from seed
Transplanting Whatfield Supergem
Whatfield Supergem is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
Harvesting Whatfield Supergem