CropsChilli Pepper (Medium) › NuMex Big Jim

NuMex Big Jim
Chilli Pepper (Medium) in the UK

These are proper big chillies, with a mild to medium heat. Great for roasting or stuffing, you get a good bit of flesh on them.

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Sow window for Chilli Pepper (Medium) generally.

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How to grow it

Right, get your chilli seeds going indoors, nice and early, from January right through to March. They need warmth, like I say in the app, about 18-25°C is spot on for germination. A heated propagator or a warm spot near a radiator works a treat, or even a warm airing cupboard. Sow them about 5mm deep in small pots or seed trays, then cover lightly with compost. If you've got grow lights, they'll really help stop them getting leggy, especially in those dark winter months up here.

Once they've got a couple of true leaves, carefully prick them out into individual 9cm pots. Keep them warm, minimum 15°C, on a sunny windowsill or in a greenhouse. Around late May, once all risk of frost has well and truly passed here in the North East, you can start thinking about hardening them off. Gradually get them used to being outside over a week or two, then plant them out into larger pots, grow bags, or directly into the greenhouse border.

Full Chilli Pepper (Medium) guide →

More Chilli Pepper (Medium) varieties

Track your Chilli Pepper (Medium) from packet to plate

Sowing reminders and harvest forecasts for your own frost dates, the Seed Tin, Scan Centre for any label or packet, and the Potty Mouth Garden Club. Free to start.

Tony C Smith
Tony C Smith

Allotment keeper in the North East of England, the voice behind the Tony C Smith YouTube channel, and the gardener who built GrowMore CookMore. Club numbers on this page update as members log their plots. Last updated 3 September 2026.