Crocosmia (or Montbretia) are fully hardy, tolerating temperatures down to -15C. This means that they can be planted directly outside in the spring in most areas.
— Plant directly into a clear, well-dug space in a border between March and May. You can also plant them in patio containers.
— Crocosmias like a rich, free-draining soil and can also tolerate heavier soil types which have a higher clay content.
— Plant the bulbs with the shoots facing upwards, around 10-15cm deep in borders or patio containers.
— Space the bulbs around 10-15cm apart in borders, or closer together (5-8cm) in pots.
— Choose a position in full sun or partial shade.
— If planting in patio containers, it’s best to use soil-based compost or multipurpose with added loam.
— Water-in after planting and continue to water regularly when in growth in the first year. Once established, they will not require additional watering unless it is very dry.
— Crocosmias usually take a year to establish before they flower, in the first year they may only produce leaves.
— Remove the flower stems after flowering and cut back foliage to ground level in autumn.