How to Overwinter Chilli Plants: Keep Your Chillies Alive Through Winter

Quick answer: To overwinter chilli plants, bring them indoors when nights drop below 10 °C, check them for pests, prune them (in autumn or at the end of winter) and keep them in a room that stays at 10 to 12 °C or warmer. A bright window keeps them slowly growing, a dark garage or cellar lets them rest. Water very little, don’t feed, and wake them up in spring.

For many chilli growers, the season ends when the first frosts arrive. But you don’t have to start from seed every year. Chillies are short-lived perennials in their native tropical climates, and with the right care they can live for several years, giving you an earlier start each season. This is called overwintering, and it’s something I do every year in my Central European garden. Here are some of my own overwintered plants:

Why Overwinter Chilli Plants?

• Head start: An established root system means earlier flowers and fruit.
• Bigger yields: Older plants are often stronger and more productive.
• Save rare varieties: Some chilli types can be tricky to source every year, and you keep your strongest plants.
• Less work in spring: No need to re-grow everything from seed.
• Satisfaction: Watching a plant survive winter and thrive again is rewarding!

Step 1: Bring Your Chilli Plants Indoors Before Frost

Chillies are tropical by nature and can’t handle frost. As soon as night temperatures start dropping below 10 °C (50 °F), it’s time to move them inside.

• Check the weather forecast for frost warnings.
• Move container plants indoors. Potted plants are much easier to move and control.
• Gently dig up plants grown in the ground and pot them up.

Step 2: Check for Pests and Remove Fruit

• Remove fruit: Pick any chillies still on the plant, so it doesn’t waste energy on them.
• Inspect the roots: Shake off excess soil and look for pests.
• Clean the leaves: Wash off aphids or mites, or give the plant a mild insecticidal soap treatment, before bringing it in. Nobody wants unwanted hitchhikers indoors!

This step matters. In spring 2025 some of my overwintered plants got infested with aphids and whiteflies, and I wrote about it in Chilli Plant Pest Infestation: Aphids and Whiteflies. Keep infested plants away from your other plants, especially seedlings, because pests love fresh leaves.

Step 3: Prune Your Chilli Plants

Pruning helps the plant focus its energy on root health instead of keeping unnecessary foliage alive. Both timings work for me:

• In autumn, when you bring them in: This is how my plants looked in October 2025 (photo below).
• At the end of winter: Before my 2026 season, I pruned my overwintered plants back hard in late winter.

Either way:

• Cut the stems back to about ⅓ of their height.
• Remove dead leaves and weak or dead-looking branches.
• Leave the main stem and a few strong nodes to keep the plant structure intact.

Step 4: Choose a Winter Spot: Bright Window or Dark Garage

Whatever you choose, the room should stay at 10 to 12 °C (50 to 54 °F) or warmer and never freeze. I have had good results with both of these options:

Option 1: A Bright Window

On a bright window (south-facing is ideal) or under grow lights, the plants keep some of their leaves and carry on growing slowly through winter. This is how I overwintered my favourites before the 2026 season: a bright window, minimal water and temperatures above 10 to 12 °C.

Option 2: A Dark Garage or Cellar

In a dark garage, cellar or unheated room, the plants go dormant and drop most of their leaves. They can look lifeless, but the stems are still alive. Dormant plants need only minimal watering. Keep them out of strong direct sun until you are ready to wake them up.

Step 5: Winter Care

During winter, less is more.

• Water sparingly: Only water when the soil is almost dry. Plants on a bright window need a little more than dormant plants in the dark, but never keep the soil soggy. Overwatering can cause root rot.
• No feeding: Nutrients aren’t needed in winter, and fertiliser can stress the plant.
• Trim dead parts: If branches look lifeless, cut them back to encourage new shoots later.
• Keep an eye on pests: Check the undersides of leaves now and then, especially on plants by the window.

Step 6: Wake Them Up in Spring

When the days get longer and temperatures rise, your chillies will start to show new growth. Around March or April:

• Move the plants to a warmer, brighter spot.
• Gradually increase watering.
• Feed with a mild fertiliser to kickstart growth.

Around late May, when nights are frost-free, move them back outside gradually so they can get used to sun and wind (hardening off).

Before long, you’ll see fresh green shoots, just like on the overwintered Naga Morich in the gallery above, bouncing back with new life! 🌱

My Overwintering Story

• May 2024: My overwintered Bolivian Rainbow came through winter looking vibrant and healthy (read Overwintered Bolivian Rainbow Looking Great).
• April 2025: Some overwintered plants got aphids and whiteflies, a good reminder to check plants before and during winter (read my pest post).
• May 2025: My Naga Morich, Habanero, Bishop’s Crown and Jalapeño plants woke up for their third growing season (read Chilli Plant Reawakens for Its Third Season).
• October 2025: I cut my plants back and brought them in for winter (the photos above).
• March 2026: My overwintered plants were already pushing new growth, way ahead of the fresh seedlings, and the Jalapeños were flowering in pots (read Mid-March 2026: Hot Pepper Year Update).

Overwintering Chilli Plants: FAQ

Can chilli plants survive winter?

Not outside in a climate with frost. Indoors, yes. Chillies are short-lived perennials, so if you bring them in before frost and keep them at 10 to 12 °C or warmer, they can survive winter and grow again in spring. Some of mine have gone into their third season.

How cold can chilli plants get?

Chilli plants can’t handle frost. I bring mine indoors as soon as nights drop below 10 °C, and over winter I keep them in a room that stays at 10 to 12 °C or warmer.

Should I prune chilli plants before winter?

You can, but you don’t have to. Pruning in autumn when you bring them in and pruning at the end of winter both work. Cut the stems back to about a third of their height and leave the main stem and a few strong nodes.

Can I keep chilli plants in a dark garage over winter?

Yes, as long as it doesn’t freeze and stays at 10 to 12 °C or warmer. In the dark the plants go dormant and drop their leaves, so water only minimally. A bright window works too, and there the plants keep some leaves and grow slowly.

When should I bring chilli plants back outside?

Wake them up indoors in March or April with more light, water and a mild feed, then move them outside gradually around late May, when nights are frost-free.

Final Thoughts

Overwintering chilli plants takes a bit of patience, but the rewards are worth it. You save time, keep your favourite varieties going and get a head start on next year’s chilli season.

Have you tried overwintering before? Share your experiences in the comments, every grower’s journey is a little different! 🌶️✨