Information from reverse of packet:
Short-lived perennial but best treated as a biennial with tall, erect spikes arranged in a pyramid bearing blue bell-shaped flowers. At Great Dixter it is grown in pots and taken indoors once flowering starts. This prevents pollination and will make flowers last longer. Sun or part shade and moist well-drained soil.
Sow onto moist compost in containers in spring or summer 20°C. Lightly cover seeds with a thin layer of fine grit. Prick out when large enough to handle.
This packet contains one glassine bag of seeds.