Veg courgette seeds sow grow harvest Ireland

Courgette Seeds (Black Beauty)

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Courgette Seeds Sowing instructions:

It would be more difficult to think of reasons why not to grow courgettes. They are easy to grow, incredibly prolific and grow freakishly fast in the summer. Two or three plants will be more than enough. In fact, your only problem will be working out what to do with a glut of courgettes. Courgette bread anyone?


March to June 


July to October 


  • Courgettes like a fertile soil. Add compost and a general fertiliser a week or two before sowing/transplanting.
  • Sow seeds indoors (in a tunnel, glasshouse or a sunny windowsill) in 10cm pots at a depth of 2cm in late April or May.
  • The seeds are large and germinate and grow quickly, so don’t put them in modules or very small pots.
  • Also, don’t sow too early as courgettes are frost sensitive and hate cold weather, so you don’t want them ready for transplanting before May.
  • Seeds can be sown direct into the soil in May, but this tends to be less successful than transplanting.


  • Courgettes should be ready for transplanting in May.
  • Space plants at least 60-80cm apart.
  • Courgettes are often transplanted through a ground cover, like perforated plastic. This helps conserve water in the soil and suppresses weeds.
  • Courgettes like the soil moist, so don’t let the soil dry out.


  • Courgettes can be harvested at any stage from small fruits (6cm long) with flowers on upwards.
  • Male flowers (those with no fruit behind them) can also be harvested.
  • The more you pick, the more fruit the plant will produce.
  • Don’t leave big marrows on the plant, as it will reduce the production of new fruits.

Visit the GIY Veg directory for more growing details and tips.

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