Crocosmias in Penmon

Crocosmia spp.

Crocosmia
Crocosmia · Crocosmia spp.

Hardy perennial grown from corms in UK borders. Plant in moist but free-draining soil in sun or light shade, water well after planting, and leave the clump to settle before lifting and dividing every few years.

90 cm · Full Sun · Moderate Water

Add to garden

Calibrated to Penmon · last frost ≈ 30 Mar

Plant out January to March. Frost risk November to March.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Plant outYesYesYesNoNoNoNoNoNoNoNoNo

Growing guide

Step-by-step instructions for growing Crocosmia

  1. 01

    Plant Corms

    28 Jan to 30 Mar

    Plant corms around 28th January - 30th March, with the growing point just below the surface in firm, well-drained soil. Space them apart and water in thoroughly straight after planting.

  2. 02

    Water to Establish

    30 Mar to 28 May

    Keep the soil evenly moist for the first 30th March - 28th May while the corms root in. Give a deep soak in dry spells, then ease off once new growth is strong and the clump is settled.

  3. 03

    Deadhead Spent Stems

    14 May to 27 Nov

    From 14th May, remove faded flower stems as they finish to keep the plant tidy and encourage a longer display. Cut each stem back to the base once the last flowers on it have gone over.

  4. 04

    Cut Back Old Growth

    13 Nov to 27 Dec

    After hard frost has blackened the leaves, cut the faded foliage to the base during 13th November - 27th December. Leave any green leaves in place until they die back naturally, because they are feeding next year's growth.

Companion plants

Tap a plant to see why it works (or doesn't) with Crocosmia.

Good companions

Plants to avoid

Why companion planting matters

Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.

Suggested varieties

Popular varieties of Crocosmia to consider

Lucifer

A widely grown crocosmia with bright red flowers and good garden vigour.

Emily McKenzie

Compact, free-flowering with orange blooms marked darker at the centre.

George Davidson

A reliable yellow-flowered cultivar that works well in mixed borders.

Star of the East

Orange-yellow flowers on arching stems, useful for a naturalistic look.

Crocosmia guides by town

See how Crocosmia timing shifts in other towns with different frost dates.