Mar, Apr, May, Sep, Oct, Nov
At its best:
Jun, Jul, Aug
Dig a hole that's a bit larger than the crown, then fork plenty of garden compost into the base. Sit the plant in the hole, so the crown is level with the soil surface. Fill around the roots with soil and firm down gently.
Water in well and continue to give it regular soakings around the crown, especially during dry spells. Apply a mulch of well-rotted manure or sprinkle general-purpose fertiliser around the plant in February.
Leave the stalks and foliage to develop for at least the first summer without pulling any. This allows the plant to become well-established so that it will produce a good crop of stems for years to come.