Hardy / perennial / border plant, medicinal plant/ seeds need 20-30 days for germination / H. up to 60cm/ sunny position / well drained soil / blossom colour yellow green / flowering time 7, 8

In the 16th and 17th centuries the candied roots were considered to be aphrodisiac, and were given with all due discretion, to older people suffering from 'loss of vital force' and short breath.