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Courgette

Cucurbita pepo

Climate-suitable non-native

Growing guidance

Horticultural figures below are practitioner estimates for planning, pending expert review. The botanical record further down is sourced and verifiable.

Current-climate suitability

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Future-climate resilience

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Sun

Full sun

Soil moisture

average, moisture-retentive

Heat tolerance

Up to about 38°C

Cold tolerance

Down to about 4°C

Waterlogging tolerance

2/5

Drought tolerance

1/5

Mature size

0.5–0.9 m tall, 1.2 m spread

Seasonal interest

Summer · Yellow flower

Maintenance

medium

Wildlife supported

General wildlife value 3/5 (verified species relationships are shown only where structured data exists)

How to plant it

General steps for this plant. Save a garden and these become specific to your location, soil and light.

  1. Step 1When to plant

    Plant during March to May, once the risk of frost has passed.

    Timing depends on your last frost date.

  2. Step 2Where to put it

    Choose a position in full sun for most of the day. Allow 1.2 m of room around it — mature spread is 1.2 m and mature height 0.5–0.9 m.

    Light in your garden is not answered, so this is the plant's own requirement.

  3. Step 3Preparing the ground

    Dig a hole twice as wide as the root ball and no deeper, loosen the sides, and plant so the top of the root ball is level with the surrounding soil.

    Soil is not answered. This plant grows in average, moisture-retentive conditions.

  4. Step 4Watering while it establishes

    Water thoroughly at planting (5–10 litres), then only when the top few centimetres of soil are dry, through the first growing season.

    Even a drought-tolerant plant (1/5 here) only becomes drought-tolerant once established.

  5. Step 5Mulch

    Spread 5–7 cm of composted bark or garden compost around the plant, keeping it clear of the stem.

    Mulch cuts water loss and suppresses weeds through the first summer, when losses are most likely.

  6. Step 6The first year

    Check watering weekly in summer, remove competing weeds, and tidy dead growth at the end of the season.

    Maintenance level on the plant record is medium.

  7. Step 7What to watch for

    Collapses without steady water; frost-tender.

    Taken from the plant record and your measured climate figures, not from a general description.

Spacing: about 1.2 m apart — roughly 7 plants for every 10 m² if planted as a group.

What this guide could not use

  • No location saved, so planting times are general rather than local.
  • Soil moisture is not answered, so soil preparation is general advice.
  • Light is not answered, so the position below is the plant's own preference.
  • Whether you can water is not answered, so watering assumes hand watering.
Answer five questions to make this specific

Built by fixed rules from: Plant record for Courgette (last reviewed 2026-06-01). Planting guide version gf-planting-1.0.0. Timings and volumes are practitioner estimates for planning, not a substitute for local nursery advice.

Known risks or warnings

Collapses without steady water; frost-tender.

Toxicity: none

Status and jurisdiction

Climate-suitable non-native in United Kingdom (Great Britain).

Register consulted: GBIF Backbone Taxonomy distributions for Great Britain

Record review status: reviewed · last reviewed 2026-06-01 · plant data version gf-plants-2026.09.18. Status claims are never inferred from climate similarity, and growing figures are estimates pending expert review.

Verified botanical record

Accepted scientific name
Cucurbita pepo L.
Family
Cucurbitaceae (Cucurbitales)
Rank and status
species · accepted
GBIF record
Taxon 2874508

Recorded as introduced in: Alabama, Albania, Amazonia colombiana: sur del departamento del Vichada; el suroriente del Meta; todo el territorio de los departamentos de Amazonas, Caquetá, Guainía, Guaviare, Putumayo y Vaupés; la Bota Caucana; y las vertientes amazónicas de Nariño (la parte alta de los ríos Guamuez, Sucio, San Miguel y Aguarico), Argentina Northeast, Argentina Northwest, Arkansas, Assam, Austria, Azores, Bahamas, Baleares, Baltic States and 107 further regions

Ranges are exactly as recorded in the GBIF source checklists and may be incomplete for widely cultivated species.

Cucurbita pepo is a cultivated plant of the genus Cucurbita. It yields varieties of winter squash and pumpkin, but the most widespread varieties belong to the subspecies Cucurbita pepo subsp. pepo, called summer squash. It has been domesticated in the Americas for thousands of years, from where it was spread by early colonisers to Europe and later across the rest of the Old World in the context of the Columbian Exchange. Some authors maintain that C. pepo is derived from C. texana, while others suggest that C. texana is merely feral C. pepo. They have a wide variety of uses, especially as a food source. C. pepo seems more closely related to C. fraterna, though disagreements exist about the exact nature of that connection, too.

Description from Wikipedia — Cucurbita pepo (CC BY-SA), shortened and unedited in substance.

Native status and geographic context

  • United Kingdom: climate-suitable
  • United States: climate-suitable
  • Australia: climate-suitable

Native status is never inferred from climate similarity. Plants restricted or invasive in a jurisdiction are excluded from recommendations there.

What to do next

Create a Garden Profile to see whether this plant suits your conditions.

Demonstration data

These figures come from the demonstration dataset kept for testing and as a fallback when the measured climate service is unavailable. They are representative, not observed, and are never presented as validated live data.