When to plant Comfrey in Cardiff

Symphytum officinale

Comfrey
Comfrey · Symphytum officinale

A hardy perennial for a permanent UK garden bed. It grows best in moist, fertile soil and is usually planted from crowns or bare roots in spring, then cut back for feed a few times each year once established.

100 cm · Partial Shade · Moderate Water

Calibrated to Cardiff · last frost ≈ 22 Apr

Plant out April to May, harvest April to September. Frost risk October to April.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Plant outNoNoNoYesYesNoNoNoNoNoNoNo
HarvestNoNoNoYesYesYesYesYesYesNoNoNo

Growing guide

What to do through the growing season

  1. 01

    Prepare the Bed

    23 Mar to 6 May

    Clear the site of perennial weeds and dig in plenty of well-rotted compost or manure before planting. Work the soil to a fine tilth and leave it settled for 23rd March - 6th May so the bed is ready for a long-term planting.

  2. 02

    Plant Crowns

    8 Apr to 20 May

    Plant dormant crowns or bare roots once the ground is workable, setting them at depth. Space them apart, then water in well straight after planting.

  3. 03

    Keep Weed Free

    8 Apr to 17 Sept Dates as each sowing reaches this stage

    Keep the bed clear of weeds and water during dry spells through 8th April - 17th September while the roots settle in. Do not cut back live growth in the first year; let the foliage build the root crown for future harvests.

  4. 04

    Top-Dress

    8 Apr to 22 Apr Optional · repeat every 365 days

    Top-dress the crown area with compost or a balanced organic feed as new growth starts. Repeat once a year from 8th April for steady leafy growth and better cutting the following season.

  5. 05

    Harvest Leaves

    29 Apr to 9 Sept 2028 Dates as each sowing reaches this stage

    Cut young leaves and stems for feed from 29th April 2028 once the plant is established. Take only a few cuts over 29th April - 9th September 2028, then stop so the plant can rebuild its crown for next year.

  6. 06

    Cut Back

    14 Oct to 11 Nov

    After the first frosts, cut the dying foliage down to ground level and clear away debris from 14th October - 11th November. This helps keep the planting tidy and reduces places where pests can overwinter.

Suggested varieties

Popular varieties of Comfrey to consider

Bocking 14

A common sterile Russian comfrey selection, widely used in UK gardens for leaf production and as a mulch crop.

Bocking 4

A well-known comfrey selection grown for vigorous leafy growth and frequent cutting for compost or liquid feed.

Comfrey guides by town

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