Easily grown in a moist soil or bog garden. Prefers a heavy soil in sun or light shade. This species is closely related to J. dudleyi. The seeds become very mucilaginous and are spread by becoming attached to tractor wheels etc.

None known

Seed - surface sow in pots in a cold frame in early spring and keep the compost moist. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer if they have grown sufficiently, otherwise in late spring of the following year. Division in spring. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

Moist sandy soils in woods. Naturalized in Britain where it grows along roadsides, on waste ground and by field paths.