20 seeds per packet. A rare species in cultivation and an endangered one in the wild, where it is only to be found in a small area of the Aso district in Kyushu, Japan. You will find this a much more delicate Polemonium species than is usually encountered, one which possesses the most amazing, beautiful, blue flowers from late spring and early summer. Height to 40 cm. Well-drained soil in sun to semi-shade. Warm germinator.