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About courgettes and squash

Courgettes, summer squash and marrows can all be grown in the same way. One plant produces a plentiful supply and courgette flowers can also be eaten as They require a sunny location and fertile, moist soil. Add plenty of compost or well-rotted manure before planting.

What to do

Sow seeds in pots

• Seed can be sown in pots from March to the end of May. Fill a 7.5cm (3in) pot with compost and firm gently.
• Sow a seed vertically 2.5cm (1in) deep and cover. Label, water and put in a propagator or on a windowsill.
• When roots begin to show through the bottom of the pot, put into a 12.5cm (5in) container. Plant out into growing bags, soil or a large pot in late spring or early summer.

Sow seeds in soil

• Seed can also be sown directly into the soil from late-May to early summer.
• Choose a sunny, sheltered spot and improve the soil by digging in some well-rotted manure or compost.
• Sow two seeds on their side 2.5cm (1in) deep and once the seedlings have germinated, take out the weakest one.

Aftercare

• Plenty of water is essential, especially when the plants are in flower and then when the fruits have started to swell. Mulch to lock in moisture.
• If you dig in plenty of manure before planting, additional feeding is unnecessary on heavy, fertile soil.
• On sandy or light soil, regular drenches with a liquid feed will help boost production.

Harvesting and storage

• To keep plants productive you need to harvest courgettes about three times a week at the height of the season.
• The correct size to pick depends on variety, but as a rule, harvest courgettes when they're 10cm (4in).
• Use a sharp knife to sever the fruit from the plant. Courgettes are best eaten fresh or can be stored for a few days in the fridge.
• Squashes are more variable in shape and size, so read the seed packet for harvesting and storage information.
• Marrows are often considered to be courgettes grown large, and require the same growing conditions.
• When growing marrows, harvest regularly when they're 20cm (8in) long, or leave them to mature for winter use.
• Marrows can be stored for a long period of time if kept at a temperature between 7.5C to 10C (45F to 50F).

Find out more about growing veg from Dig In.

Five to try

Here are some of the best, with lots of new varieties being introduced each year.

• Courgette 'Gold Rush' - a yellow-skinned variety
• Courgette 'Defender' - produces heavy crops of green fruit
• Squash 'Sweet Dumpling' - white with a green stripe
• Squash 'Baby Bear' - flattened orange fruit and very tasty seeds
• Squash 'Turk's Turban' - orange with distinctive cream and green stripes