germinate only when warm, close to 21 C. The plants prefer warm conditions, but can tolerate temperatures down to 12 C; and are sensitive to cold. The flowers can self-pollinate. However, at extremely high temperatures, 30 to 38 °C, pollen loses viability, and its flowers are much less likely to result in fruit. For flowering, Capsicum is a non-photoperiod-sensitive crop.

Chilies are vulnerable to pests including aphids,