How to Grow Cucumbers


  • Sowing Instructions
  • How to Transplant
  • Crop Maintenance
  • How to Harvest
  • Storage
  • Pests & Diseases

Sowing Instructions  

Sowing Time: Sow the seeds mid March through to mid May but seeds must be kept warm – wait for warm weather

  • Sowing Location: Indoors, in greenhouse  or a heated propagator set to 21°C
  • Sow seeds in 9cm pots
  • Sow one seed per pot using potting compost
  • Soak compost before sowing & cover
  • Cucumber seeds germinate after 1 or 2 weeks

How to Transplant

  • Check your variety before transplanting
  • Outdoor or ridge varieties can be both male & female, they will pollinate each other
  • Most new hybrids are all female & don’t require pollination

Indoor varieties

  • Grow in green house or poly tunnel
  • Plant in large pots or 3 per grow bag
  • Provide light shade

Outdoor varieties

  • Transplant in midsummer – ridge varieties can be planted outdoors
  • Soil
    • Fertile soil with good drainage
    • Warm soil is very important
  • Prepare soil the previous season before planting out
  • Add plenty of well rotted farm yard manure
  • Harden off outdoor varieties before planting out
  • Only plant out after the chance of frost has gone

Crop Maintenance

  • Cucumbers are climbers so support them using garden twine tied loosely around the base of plants
  • Water when getting dry
  • Don’t over water and don’t let them dry out
  • Increase humidity by watering the floor around them
  • Once flowering begins, feed with a potassium based feed    


  • Cut fruits as soon as they are ready
  • The size will depend on the variety you are growing
  • Cut regularly to encourage further production


  • Cucumbers keep well
  • Can't freeze but will last a while once cut without turning bad

Pests & Diseases

  • Pests:  Slugs will damage leaves and fruits
  • Position slug traps or copper slug tape near the crop to prevent attack from slugs
  • Diseases: Generally trouble free if the summer is good
  • Other issues can include powdery mildew and leaf spot
  • Note: The Cucumber variety Louisa is resistant  to powdery mildew and leaf spot

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