How to grow courgettes

Discover how to sow, plant and grow courgettes to enjoy from the garden, in this practical Grow Guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Do not Sow in January

Do not Sow in February

Do not Sow in March

Do Sow in April

Do Sow in May

Do Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December


Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December


Do not Harvest in January

Do not Harvest in February

Do not Harvest in March

Do not Harvest in April

Do not Harvest in May

Do not Harvest in June

Do Harvest in July

Do Harvest in August

Do Harvest in September

Do Harvest in October

Do not Harvest in November

Do not Harvest in December

  • Average Yield

    4.5kg per 3m row

  • Spacing

    90cm apart

    90cm between rows

  • Depth


Simple to grow in a warm, sunny spot, courgettes are highly productive. So, unless you have an unusually large number of mouths to feed, just two or three plants should be enough.

Courgettes are best used fresh, but can be kept for a short period of time by storing in a cool, dry place.

Growing courgettes from seed

Planting out young courgette plug plants

How to sow and plant courgettes

For early crops, sow courgette seeds indoors in mid-spring. Sow seeds in pots or module trays using moist multi-purpose compost. For later crops, sow seeds outside in late spring.

When seedlings appear, move stronger ones to larger pots. Throw away weaker seedlings. Grow on indoors until ready to plant outside in late spring, after the last frost. Space plants 90cm apart, then mulch the surrounding soil generously to hold in moisture.

If you don’t have the time or space to sow seeds indoors, then you can buy ready-grown, vigorous plants from most garden centres in late spring.

Courgette flowers

Crop care

Plenty of moisture is the key to success. A constantly just-moist soil is essential if plants are to crop to their full potential. So water regularly and apply a thick layer of mulch to hold water in the soil.

In dry conditions, most varieties produce mainly non-fruiting male flowers. To encourage female flowers, which are the ones that produce fruit, water generously and regularly. Apply tomato fertiliser once a fortnight to promote growth and flowering.

Courgettes ready to harvest

Harvesting courgettes

Cut courgettes while they are small (about 10cm long is ideal), rather than leaving them to grow to the size of marrows – this will help to encourage more fruits.

Courgette storage

Courgettes are best used fresh, but can be kept for a short period of time by storing in a cool, dry place. Alternatively, turn gluts into chutneys or pickles.

Preparation and uses of courgettes

Courgettes can be steamed, fried or grilled. Spherical varieties are perfect for stuffing then baking.

Courgettes: problem solving

Courgette rot is a common problem in damp weather. It often spreads from the faded flower into the end of the courgette itself. Never water plants from above – always direct water down onto the soil around the stem. Keep a close eye on plants during wet weather and remove any soggy flowers from the end of developing fruits. Deter slugs by putting crushed shells around the stem base, or use a biological pest control.


Try a climbing courgette

Although most courgettes trail along the ground, there are climbing varieties for those short of space. ‘Black Forest’ and ‘Tromboncino’ are easy to train up a stake, as long as they are regularly tied in as they grow.

Fresh courgettes
Harvested ripe courgettes

Great courgette varieties to grow

  • ‘Defender’ – a heavy cropper with green fruits and good disease resistance
  • ‘Gold Rush’ – with long, golden-yellow fruits
  • ‘One Ball’ – the vibrant yellow, spherical fruits have a creamy flesh
  • ‘Tondo di Nizza’ – tennis ball-sized, pale green fruit
  • ‘Venus’ – a compact patio variety, ideal in pots
  • ‘Zucchini’ – prolific, classic green courgette
  • ‘Ambassador’ – high-yielding variety, bears dark green fruit with a crisp white flesh, over a long season.