Rekha Mistry: Chilli peppers

Rekha is taking a closer look at this fiery fruit with a global legacy

In the 15th century, thanks to the voyages of Christopher Columbus, a fiery little fruit made its way from the Americas to Europe and Asia: the chilli pepper. Native to regions such as Mexico, where chillies have been cultivated and celebrated for over 6,000 year. This vibrant fruit quickly embed-ded itself into cuisines across the world. Today, whether offering a gentle warmth or an eye-watering inferno, chillies tantalise our taste buds like few other plants can.

Belonging to the Capsicum genus, chilli peppers boast extraordinary diversity. From mild and sweet to explosively hot, there truly is a chilli to suit every palate. Beyond their heat, they bring col-our, aroma, and complexity to dishes, and for growers, they offer a deeply rewarding journey from seed to harvest.

Starting early: Sowing chillies in winter

A new year signals a fresh beginning, and for chilli growers, January is the perfect time to start. Sowing seeds in the depth of winter provides a valuable head start, allowing for a longer and more productive fruiting season. With the help of heat mats and grow lamps, a temporary indoor garden can replicate the warmth these tropical plants crave.

Seeds are typically sown into hydrated coir pellets or seed trays filled with peat-free seed compost. Prior to sowing, soaking the seeds in cooled chamomile tea can help improve germination. Each seed is planted around 1cm deep, then placed into a propagator and set on a temperature-con-trolled heat mat. Grow lights are introduced only after germination to prevent weak, spindly growth.

Once seedlings develop two healthy true leaves, they are potted on into individual 7cm pots, re-maining within the comfort of the propagation area while they establish.

From propagator to greenhouse

As daylight increases and temperatures slowly rise, the young plants are moved into a tempera-ture-controlled greenhouse. By this stage, they are usually around 20cm tall and robust enough to cope with slightly cooler nights. Given the UK’s famously unpredictable weather, chilli plants will always benefit from the protection of a greenhouse or polytunnel.

Over time, plants are potted up gradually, from 7cm to 9cm pots, and then into one-litre containers. Around May, once all risk of frost has passed and plants have acclimatised in the new space, they are ready for their final planting position. This may be in 9 litre terracotta or plastic pots or directly into raised beds in a polytunnel.

Care, feeding, and flowering

Watering is done sparingly, only when the compost is drier deeper down. This encourages strong root growth. Once flowers appear, a weekly feeding regime begins using a high-potash organic fer-tiliser to support fruit development.

Humidity plays a crucial role throughout the growing season. Maintaining a moist atmosphere re-flects the chilli’s tropical heritage. It also keeps plants hydrated, and helps deter common pests such as spider mites and green aphids.

As fruits begin to form, plants benefit from leaf growth being removed from the base upwards. This improves airflow, directs energy toward fruit production, and allows water and nutrients to reach where they’re needed most: fruit production.

Harvesting and preserving the heat

Regular harvesting is key. The more chillies you pick, the more flowers and fruit the plant will pro-duce, ensuring a continuous supply throughout the season.

Once harvested and fully dried, chillies can be stored for several years in an airtight jar kept in a cool, dark cupboard or pantry. They can be threaded into decorative ristras, ground into fragrant chilli powder. Fresh fruits can be preserved through pickling, capturing the taste of summer long after the growing season ends.

From ancient Mexican fields to modern greenhouses, the chilli pepper remains a symbol of heat, heritage, and horticultural joy. Whether you grow them for flavour, fire, or sheer fascination, these remarkable fruits never fail to deliver.

Varieties to grow

• ‘Jalapeno’ a popular moderate heat and versatile flavour often used in salsas and pickles. SHU 2,500 - 8,000.

• ‘De Cayenne’ named after the city in French Guiana. A popular and versatile chilli for mak-ing powder, flakes and sauces. SHU 30,000 - 50,000.

• ‘Lemon Drop’ Originating from Peru with unique tangy citrus lemon flavours with spicy heat. SHU 30,000 - 50,000.

• ‘Orange Habanero’ small lantern-shaped glossy fruit. A fiery fruity cultivar deeply rooted in Yucatecan and Caribbean cuisine. SHU 100,000 - 350,000.

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