Marrows in Gillock

Cucurbita pepo

Marrow
Marrow · Cucurbita pepo

A tender summer squash grown outdoors in rich, moisture-retentive soil once frost risk has passed. Start indoors for the best crop in the UK, then plant out into a sunny, sheltered spot and keep the plants well watered and fed through summer.

60 cm · Full Sun · High Water

Calibrated to Gillock · last frost ≈ 4 Jun

Sow indoors May, plant out June, harvest August to September. Frost risk September to June.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow indoorsNoNoNoNoYesNoNoNoNoNoNoNo
Plant outNoNoNoNoNoYesNoNoNoNoNoNo
HarvestNoNoNoNoNoNoNoYesYesNoNoNo

Growing guide

Step-by-step instructions for growing Marrow

  1. 01

    Sow Seeds Indoors

    14 May to 21 May

    Sow seeds on their edge around 14th May - 21st May in small pots of warm seed compost. Keep them at and do not sow too early, because marrow seedlings grow fast and can suffer if they become root-bound.

  2. 02

    Pot On Seedlings

    31 May to 14 Jun

    When the first true leaves appear, prick out or move each seedling into a larger pot at 31st May - 14th June. Handle them gently and keep the compost just moist, not wet.

  3. 03

    Harden Off Plants

    21 May to 4 Jun

    From 21st May - 4th June, move the plants outside for short periods each day so they adjust to wind, cooler nights and direct sun. Keep them under fleece or in a cold frame at night if conditions are still unsettled.

  4. 04

    Plant Out

    18 Jun to 25 Jun

    Set plants out at 18th June - 25th June once frost risk has passed and the soil is warm. Plant into rich, well-watered mounds or pockets, then water in thoroughly without wetting the stem.

  5. 05

    Support and Train

    5 Jul to 20 Aug

    From 5th July - 20th August, keep the plants centred on their mound and tuck the stems back if they stray. In a small garden, use a short frame or straw to keep fruit off damp soil and reduce rot.

  6. 06

    Feed and Water

    21 Jul to 9 Sept every 2 weeks

    From 21st July - 9th September, water deeply around the plant rather than over the leaves, and feed every 14 days once the first fruits set. Keep the compost or soil evenly moist so the fruit fills properly and avoids bitterness.

  7. 07

    Harvest Fruits

    5 Aug to 9 Sept

    Pick fruits from 5th August while they are still young and tender, then keep harvesting regularly until 9th September. Cut them with a knife or secateurs so you do not damage the stem, and check plants every few days for fruits that are ready.

Companion plants

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

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 Marrow to consider

Bush Baby

Compact bush marrow with small, tender fruits, useful where space is limited.

Tiger Cross

A reliable UK-grown type with good vigour and pale-striped fruits.

Eight Ball

Round-fruited type that crops well as a baby marrow when picked small.

Marrow guides by town

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