10 seeds per packet.
A species that is native to Xinjiang province in China, Kazakhstan and Kyrgyzstan, and is rarely seen in gardens. Produces grey-green foliage and upright spikes of attractive, blue-purple, summer flowers with purple-red bracts. Fantastic plant for bees and other insects. Height 70 cm. Well-drained soil in sun to part shade.
Can be sown from autumn to June. Cover seed thinly, press in gently and keep top of compost from drying out. Keep pot cool over winter. Keep warm at 15 to 20°C in spring until germination, then move to somewhere cooler.
Carefully prick out seedlings when they have developed true leaves and are large enough to transplant to individual pots to grow on.