This step in overwintering pepper plants will remove the dying leaves and make the plant less susceptible to pests. Once the side branches have been trimmed off cut the main stem leaving 150 to 350 mm depending upon the plant. Save Your Pepper Plants A Simple Guide On How To Overwinter Your Chilli Pepper Plants Chillidave Shows Us Chili Pepper Plant Pepper Plants Hot Peppers Plants It also helps you to get much bigger yields as the plantscan support more weig. How to overwinter chilli plants . Overwintering chilli plants is a great way to get a flying start thenext year. A simple guide on how to overwinter your chilli pepper plants. Water the plants infrequently. If the room is unheated such as a conservatory then place a piece of perspex or thick card between the window and the plant to protect against frost damage in severe winters. Avoid cold draughts and do not leave behind curtains. Prune back the branches of the pepper plant to a few main Ys on the plant leaving abou...