How to grow Sweet william 'La Bourboule'
Keep in mind when planting that La Bourboule is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Growing La Bourboule from seed
Transplanting La Bourboule
As La Bourboule is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
Harvesting La Bourboule