— Plant your Achillea (or Yarrow) outdoors in spring or autumn.

— Choose a place in full sun, in well-drained soil.

— Space plants 45cm apart.

— Water-in after planting; never allow plants to become waterlogged.

— Stake using brushwood or bamboo canes, before the flowers appear.

— Cut back after the first flowering to encourage a second flush in late summer.

— Lift and divide clumps every three to five years, in late autumn or early spring.

— Read further general instructions about planting bare-root perennials