We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in most parts of this country. It is a polymorphic species. The following notes are based on the general needs of the genus. Prefers a light well-drained moderately rich loam in an open position. Succeeds in dry soils. Hybridizes with other members of this genus. The ripe seed is released explosively from the seed capsules. Members of this genus are rarely if ever troubled by browsing deer or rabbits. This genus has been singled out as a potential source of latex (for making rubber) for the temperate zone, although no individual species has been singled out.

None known

Seed - sow spring in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.

Grassy places in lowland and mountains, C. and S. Japan.