Comfreys in Penrallt

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 Penrallt · last frost ≈ 18 Apr

Plant out April to May, harvest April to August. Frost risk November to April.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Plant outNoNoNoYesYesNoNoNoNoNoNoNo
HarvestNoNoNoYesYesYesYesYesNoNoNoNo

Growing guide

Step-by-step instructions for growing Comfrey

  1. 01

    Prepare the Bed

    19 Mar to 2 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 19th March - 2nd May so the bed is ready for a long-term planting.

  2. 02

    Plant Crowns

    4 Apr to 16 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

    25 Apr to 23 Aug

    Keep the bed clear of weeds and water during dry spells through 25th April - 23rd August while the roots settle in. Do not cut any growth in the first year, let the foliage build the root crown for future harvests.

  4. 04

    Top-Dress

    4 Apr to 18 Apr every 365 days

    Top-dress the crown area with compost or a balanced organic feed as new growth starts. Repeat once a year from 4th April for steady leafy growth and better cutting the following season.

  5. 05

    Harvest Leaves

    18 Apr to 16 Aug

    Cut young leaves and stems for feed from 18th April once the plant is established. Take only a few cuts over 18th April - 16th August, then stop so the plant can rebuild its crown for next year.

  6. 06

    Cut Back

    31 Oct to 28 Nov

    After the first frosts, cut the dying foliage down to ground level and clear away debris from 31st October - 28th November. This helps keep the planting tidy and reduces places where pests can overwinter.

Companion plants

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

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 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.