Chilli

Capsicum ssp. chilli
Other names
chilli
Botanical name
Capsicum ssp.
Plant category
Fruit vegetables

General

Chilli
Peter Turner Photography/Shutterstock.com

Growing and eating different chilli varieties has become increasingly popular over the last few years. There's a huge range of varieties with different flavours and heat levels. The substance that causes the heat is called capsaicin, and the heat level is measured in Scoville units. The hottest chilli in the world, the `Carolina Reaper', has clocked in at around 2 million Scoville. For comparison, pepper spray only has about 200,000 Scoville and Tabasco only about 4,000 Scoville.

Chilli plants have a very long growing period and need a lot of warmth. That's why they're not really suited to outdoor growing, unless you live in a region with a mild, wine-growing climate. Some robust varieties can be grown in pots in a sheltered spot on a balcony or terrace though.

Facts and figures

Light requirements
Sun
Nutrient requirements
Heavy feeder
Difficulty level
Intermediate
Culture (according to Gertrud Franck)
A - tall or wide crops, almost year-round
Growing period
180 days
Row spacing
60 cm
Plant spacing
50 cm
Growth height
60 - 150 cm
Sowing depth
1 cm
Germination temperature (minimum)
20 °C
Germination temperature (optimal)
25 - 30 °C
Germination type
Light and dark
Pre-growing period
85 days

Times

1
2
3
4
5
6
7
8
9
10
11
12
Pre-grow
Transplant
Harvest

OutdoorsTransplant to bed from Early June to Early July. Pre-grow about 85 days before planting out, approximately between Early March and Early April. After a growing period of 180 days, harvest can begin around Mid August and continues until Late October.

GreenhouseTransplant to bed from Late April to Early July. Pre-grow about 85 days before planting out, approximately between Late January and Early April. After a growing period of 180 days, harvest can begin around Mid July and continues until Mid November.

Sowing and planting

Whether chilli and pepper seeds are dark germinators or light germinators depends on the variety. Most varieties are dark germinators, but a few need light to germinate.

Location and soil

Sunny and warm. Ideally in a greenhouse or on a sunny balcony or terrace.

Neighbourhood

Good neighbours
Bad neighbours
Very bad neighbours

Crop rotation

Good predecessors
Bad predecessors
Bad successors

Varieties

There's a rich palette of varieties. They differ enormously in shape, colour, flavour and above all heat level. Everything from a mild tingle on the tongue to "chemical weapon" territory is possible.

Harvest and processing

When processing chillies, always wear gloves if you want to avoid your hands — and everything you touch with them (eyes, nose...) — burning for hours. Most of the capsaicin sits in the seeds and the membranes they're attached to.

Capsaicin isn't water-soluble. That's why water or lemonade won't help against the heat. Fatty foods like milk, yoghurt or a cheese sandwich will soothe the pain though.