If you want to grow chillies with a bit of bite, there are plenty of tricks you can employ. Getting the right growing conditions is vital - the hotter the growing conditions, the hotter the chilli, which is why they grow well in hot parts of the world.
Matt Simpson of Simpson's Seeds has grown some of the UK's hottest chillies, named 'Katie' and 'Lucy' after his daughters. He's employed some unusual tricks to increase the heat of his fruits.
He has discovered that by stressing plants - by damaging them, denying them food and water, subjecting them to extreme heat and even shouting at them - you cause the plant's natural defences to kick in and make the chillies spicier in a bid to stop them being eaten by animals.
Here, Matt shares his tips to help you grow a super-hot chilli.