Seeds in Blumen Bag of Double Campanula in Mixture. Biennial plant suitable for flower beds and borders, for rock gardens and as a pot plant. Sowing Period: March - June Flowering period: June - September Sowing depth: 0.5 cm Transplant: the seedling must be transplanted when it reaches 10 cm in height. Transplant one plant to the other at a distance of 30 cm. Flower height: about 40 cm Blumen seeds are packaged with a 3 PAC barrier effect protection system (polythene-aluminum-paper) to preserve the high vitality and quality unaltered.