I Overwintered Pepper Plants in Zone 6a: What Worked and What I Learned

Did you know peppers are actually perennial plants? When I realized that my thriving pepper plants could be overwintered and possibly become bigger plants next summer, I was intrigued. 

Could I keep pepper plants alive through a Zone 6a winter and harvest peppers earlier the following year? I decided to experiment by bringing some pepper plants inside. My goal was to see if it was possible and how much work it would be. Would the time and effort be worth it?

After all, I’d been successful with overwintering dahlia, amaryllis, and other bulbs. I’d even been able to bring in Mandevilla and have it thrive through winter.

A tropical vegetable plant seemed like the next step. If I could keep it from dying, perhaps it could recover in spring and produce peppers earlier than if I started again from seed.

Peppers are warm-season plants. Their growth slows dramatically in cool temperatures, and freezing temperatures can kill them. So once the cooler fall weather settles in, pepper plants naturally start going dormant. The trick is to keep a dormant pepper plant alive so it can regrow when temperatures warm back up.

Overwintering a pepper plant isn’t the same as keeping it thriving and producing. It just means protecting the plant so freezing temperatures won’t kill it. Much like storing tubers and bulbs, or so I thought. 

I had three pepper varieties that I had started from seed indoors in March. I decided to overwinter all three because they were all my favorites. Also, by the end of summer they were producing so well it seemed a crime to throw them on the compost heap.

This turned out to be a good idea because these three varieties differed in how they responded to overwintering. 

I had several Bird Seed Thai Pepper plants already growing in small pots. These seemed to be the easiest to try overwintering. They’re naturally small pepper plants with small peppers. Bird Seed Thai peppers grow well in containers and make a beautiful ornamental plant even if you don’t need that many hot peppers.

The jalapeño plants in my raised bed were productive and healthy, so I was excited to see if they could continue into the next summer. However, I also had a jalapeño in a pot in a shady spot. It hadn’t grown very big or produced many peppers.

My California Wonder Pepper plants were in a raised bed, and some were in pots. Because I love to eat fresh green peppers, I chose to overwinter two plants: one that was growing in the garden and one already in a pot. 

There are multiple ways to prepare plants for overwintering. My experiment was less about finding the best way to overwinter and more about seeing whether it was even possible in my growing zone and under my conditions. 

From what I learned in my research, the basic idea is to make the plant go dormant. I saw that most gardeners pruned back all the growth to just a few branches and removed all the leaves. 

This method made sense to me. I didn’t want to have to mess with the pepper plants too much over the winter. I wanted a process like storing bulbs and tubers. Prep it and forget about it. 

What the pepper plants looked like after pruning and bringing them inside.

By the end of October it was getting colder at night, and it was time to pull out the pepper plants if I wanted to try overwintering. 

To overwinter, the pepper plants needed to come inside before a frost or freeze. 

Most gardeners recommend rinsing off the roots and replanting them in clean potting mix. However, I did not follow that advice and just used what soil I had. I also used plastic pots that I had available.

Once they were all in their new pots, I watered the pepper plants and took them indoors.

The overwintering tips I had were to remove all the leaves and prune the stems back. This seemed rather drastic, but it's also similar to storing corms and bulbs.

The Bird Seed Thai Pepper plant had been very productive and still had lots of peppers, but wasn’t producing any new flowers. I picked all the peppers and then stripped off the leaves. It was already in a pot, but I transferred it to a slightly larger one.

I dug up the healthy jalapeño plant from the raised bed and transferred it to a 1-gallon pot. I pruned back the branches and removed the leaves.

The two California Wonder Peppers were given a little different treatment. When I took off all the leaves and pruned the first plant down to a very sad-looking twig, it was a little alarming. So, for the second California Wonder Plant, I pruned it back, but I didn’t remove all the leaves. I left about 7 leaves for good luck.

In the photos, you can see that the plant with the most leaves is a California Wonder Pepper.

I left a lot of small branches on the Thai pepper plant, but no leaves. 

At this point, I hoped the process would work, but I also knew I could plant more seeds indoors in March if this completely failed. 

I first put the pepper plants in the basement storage room to quarantine them long enough to see if there were any bugs on them. They seemed to be okay, and I didn’t notice any pests.

For the first two months, the plants were kept in almost complete darkness. Only when someone was in the storage room were the lights turned on. Since this room also had a workbench and exercise equipment, the lights could be on for a few hours every day. I’m not sure if this was a good thing or not. Random lights on and off. Not the recommended way you would use grow lights for seedlings. 

In January, the pepper plants looked the same as when I’d brought them inside. At this time, I moved them to another room in the basement. In this new spot, the plants received fairly bright morning sunlight. 

My initial intention was just to keep the root system alive. So I wasn’t trying to keep the soil really moist. I also didn’t want to fertilize or encourage new growth.

I only watered the pepper plants enough to keep them from completely dying out. They were watered much less often than my regular houseplants. 

Every week or so I would stick my finger in and see how dry the soil was. When it seemed completely dry, I would give it a little bit of water.

However, once the plants were in a spot with more light and started growing again, I kept the soil more moist.

By the end of January, there were lots of signs of new growth. The Thai pepper plant had sprouted many new leaves on all the little branches. The California Wonder had several blossoms and even a pepper!

In February, I picked the California Wonder Pepper. It was delicious! 

I was thinking maybe the half-dead pepper plants in the basement weren’t such an eyesore. 

In March, I noticed tiny white flies on the California Wonder Pepper. I wiped down the leaves, and they didn’t seem to spread to the other plants. However, I think whatever pest it was did damage to the plant, and it never really recovered. The leaves continued to be a yellowish color the rest of the year. 

2026 was a year of up-and-down temperatures. The daffodils, tulips, and hyacinths came up early and froze. So I was careful about preparing the pepper plants for life outside. 

By April, I could put the pepper plants outside on nice days. The plants were slowly growing more leaves and blossoms. The Thai pepper was the fastest at putting out new leaf growth. The California Wonder that had pest damage was the slowest at putting out new leaves.

I only took them outdoors when there was sunlight, and it was warmer than 50ºF. The nights were still in the 40s, so I would bring them back in. It was a little like hardening off seedlings, but in larger pots, and hopefully the plants were a little more resilient. 

Going back and forth between inside and out gave the plants more sunshine. There were a few nights when I forgot to bring the plants back indoors. They survived the cool nights in the upper 40s, but it probably didn’t help them thrive.

For me, the results of my pepper plant overwintering experiment were worth taking note of. Although this wasn’t a very scientific experiment–no controls and not great record-keeping–what I saw made me ask more questions. 

Year one: 

• March - Started seeds indoors under grow lights with heat mats 

• April and into May - Hardening off seedlings 

• May - Plants transferred to garden

• July - Picking peppers

Year two: 

• November & December - Plants indoors in the dark and cool for 2 months 

• January - Moved plants to an area with low light

• February - 1 green pepper 

• March into May - Moving plants outdoors during the day

• June - Picking peppers

Jalapeño peppers ready to harvest in June.

I don’t have exact dates, so I don’t know exactly when I started harvesting peppers. But it looks like I had the main harvest only a month earlier than starting from seed if you don’t count the lucky one in February. 

My results show that I was harvesting peppers a month earlier than when I started from seed. 

If it’s important to you to have peppers early in the season, then you might consider overwintering. 

Another trade-off to consider is space and time. Depending on your location, you may have pepper plants indoors a lot longer than you have space for. That's why there are so many variables in gardening. You have to consider what makes sense for you in your situation.

There are a few things that I want to change next year. 

First, I’ll put the pepper plants in houseplant pots with rolling trays/saucers. This will make them less of an eyesore indoors and easier to move around. 

I’d also like to try keeping the pepper plants in the area with more sunlight. This may give them an even earlier harvest. This time I’ll keep them watered.

I’ll also start my California Wonder Peppers from seed earlier than I have in the past. Because now I know how long it can take for them to become productive. 

When I was overwintering, I only had room for a few plants. But if I start from seed, I have lots of room for small pepper plants in my grow station. Lots of small seedlings mean more pepper plants in the summer. 

Yes. I started this experiment because I was curious. And what I learned makes me want to try more variables. Next, I want to see if plants will do well in the sunny spots with the rest of my houseplants. 

Although I only had peppers ready a month earlier, it wasn’t difficult to keep the plants alive. The biggest struggle was finding the right spot for the mature plants to thrive outdoors.

So can I keep it up for another year? 

It’s worth a try!