Requires a fertile, moisture retentive well-drained soil and a warm situation in sun or semi-shade. Prefers a dry sheltered border and a peaty loam. Requires a well-drained soil that stays moist in the summer. Plants succeed in maritime gardens. Possibly hardy to about -10°c. Another report suggests that plants will only tolerate light frosts, but they should prove hardy in selected sites in the mildest areas of the country. The roots should be planted 15 - 20cm deep when dormant in late summer to autumn and then be well mulched to protect them from severe winter weather. Somewhat intolerant of root disturbance, the roots are fleshy and brittle.

Root - cooked. A source of starch.

Seed - best sown in individual pots in a cold frame as soon as it is ripe although seedlings can be transplanted successfully if they are moved with care whilst small. Pre-soak stored seed for 12 hrs in warm water, warm stratify for 4 weeks at 25°c and then reduce the temperature to 10°c. Excising a small bit of the seed near the embryo after the seed has been warm stratified helps to speed up the germination process. Plant out about 20cm deep into their permanent positions in late summer or autumn. Division in April or October with care since the plant resents root disturbance. Ensure each portion has a growth bud.

Sand dunes along the coast.