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From Greenhouse to Garden: A Guide to Chilli Growing in the UK

While the UK may not be known for its scorching hot climate, chilli growing has gained popularity among gardening enthusiasts across the country. With the right techniques and a bit of TLC, it is possible to grow an array of flavourful and fiery chillies right in your own backyard. In this blog post, I'll provide you with a comprehensive guide to growing chillies in the UK, from selecting the right varieties to nurturing your plants to fruitful harvests.

Choosing the Right Chilli Varieties:

The first step in successful chilli growing is selecting the right varieties suited for the UK climate. Opt for chillies that are known for their adaptability and shorter growing season, as the UK's cooler temperatures require more resilient plants.

  • Some recommended varieties for UK gardeners include Apache, Jalapeno, Hungarian Hot Wax, and Scotch Bonnet. These varieties offer a range of heat levels and flavours to suit your preferences.

  • Superhot varieties of chilli, such as Fatalli and Carolina Reaper will also grow well to given the right conditions but will need starting under lights indoors and early to ensure they get full use of the British growing season.

Starting Seeds Indoors:

To get a head start on the growing season, it's advisable to start chilli seeds indoors, typically in late winter or early spring. I tend to start all of my chillies the first week of January to give them the best possible head start.

  • Fill seed trays or small pots with seed compost, sow the seeds at a shallow depth, and cover them lightly with compost. Place the trays/pots in a warm and well-lit spot, such as a windowsill or greenhouse. Maintain consistent moisture levels, and within a few weeks, you should see seedlings emerging.

Transplanting Seedlings:

Once the seedlings have grown to a sturdy size and outdoor temperatures have warmed up (typically around May in the UK), it's time to transplant them into larger pots or containers.

  • Choose containers with good drainage and fill them with a well-draining compost mix. Gently remove the seedlings from their trays, being careful not to damage the roots, and transplant them into the pots.

  • Place the pots in a sunny and sheltered spot or consider using a greenhouse or polytunnel for added warmth.

Watering and Feeding:

Chillies require consistent moisture but should not be overwatered.

  • Allow the top layer of soil to dry out slightly between waterings to prevent waterlogging. When watering, aim to thoroughly moisten the soil, but avoid excessive soaking.

  • Additionally, regular feeding with a balanced liquid fertilizer every two to three weeks during the growing season will provide essential nutrients for healthy plant development and abundant fruiting.

Managing Temperature and Sunlight:

Chillies thrive in warm and sunny conditions.

  • While the UK climate can be challenging, you can create a microclimate for your chilli plants to help them flourish. Consider using cloches or fleece covers to protect young plants from cold snaps, especially in the early stages.

  • Placing your pots or containers against a south-facing wall or using reflective surfaces can help maximize sunlight exposure and provide some additional warmth.

Pruning and Supporting:

As your chilli plants grow, they may require support to prevent branches from breaking under the weight of the fruit.

  • Use stakes or cages to provide stability. Pruning is also essential for encouraging bushier growth and higher yields.

  • Pinch off the top of the main stem when your plant reaches the desired height, which will stimulate side branching and increase fruit production.

Harvesting and Enjoying the Fruits of Your Labour:

Chillies can be harvested when they reach the desired size and colour.

  • Most varieties start off green and then transition to yellow, orange, red, or even purple, depending on the variety.

  • Use clean, sharp scissors to harvest the chillies, leaving a short stem intact. Be cautious when handling hot varieties and consider wearing gloves to protect your hands.


Growing chillies in the UK is a rewarding and delicious endeavour, and with the right knowledge and a little care, you can enjoy the spicy fruits of your labour. From the selection of appropriate chilli varieties to nurturing your plants through their growth cycle, this comprehensive guide has provided you with the essential steps to ensure a successful chilli harvest, even in the UK's cooler climate.

As you embark on your chilli-growing journey, remember that each plant tells a unique story, shaped by its variety, the care you've provided, and the ever-changing British weather. It's a testament to nature's resilience and your dedication as a gardener.

Whether you're adding a dash of heat to your favourite dishes, experimenting with new recipes, or sharing your chilli harvest with friends and family, your home-grown chillies are more than just a condiment; they're a testament to your green thumb and a taste of the rich diversity of chili pepper flavours. Happy growing and savour the spice!

Please leave a comment below if you have any questions.

The Lazy Scientist

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