Skip to main content

Start these vegetables in the greenhouse this winter for a delicious harvest

Many people associate garden-fresh vegetables and fruits with the fall or warmer-weather months. But if you have a greenhouse or access to a greenhouse, you don’t have to halt production just because winter has arrived.

Are greenhouses suitable for growing vegetables when thermometers drop? You bet. A vegetable greenhouse can give back a significant yield in the winter, especially if you know which vegetables do well in this environment. It may take a little extra knowledge and focus, but most experienced gardeners should be able to transition to the winter vegetable greenhouse without any major headaches.

To get you going, start these vegetables in the greenhouse now for a delicious harvest down the road.

Image used with permission by copyright holder

Before we get started, a few caveats: First, you may want to learn more about what grows well in your particular climate. Although winter vegetables are pretty hardy customers, not all winters are created equal. Check seed catalogs, local businesses, or other resources to learn more about what works for you.


It doesn’t get much hardier than the carrot. Carrots can resist frost; they were built to thrive in cooler weather.

Plant seeds in loose, well-aerated soil (forget the manure, which can over nourish the seeds). They do best at temperatures between 55 and 75 degrees Fahrenheit — conveniently, the typical temperature range for a greenhouse not heated by artificial sources. Plant seeds in a large planter or another container, about six inches apart. Eliminate weaker seedlings as they grow. Water no more than an inch a week, achieving moist but not soggy soil.

Carrots are normally ready to harvest about two months after sowing.

For some extra fun, try growing an heirloom carrot variety, which is just as good in cold weather as their traditional counterparts.


Beets are a versatile root vegetable that are good roasted, pickled, or anything in between.

Start prepping for your beet crop in late autumn by laying down straw or leaf mulch over planting before the soil freezes. Beets like fertilizers, including compost and manure, so feel free to add some to the soil before sowing.

Dampen seeds just before planting, plant rows roughly four inches apart, and cover seeds with about a half-inch of soil. The soil must be at least eight inches deep for large, healthy roots to grow. Keep soil moist but not too wet.

Your beets will be ready to harvest in roughly 40 to 60 days.

Image used with permission by copyright holder


Kale is widely viewed as one of the world’s great superfoods, and its tough-leafed exterior makes it one of the hardiest and most winter-friendly vegetables out there.

Plant seeds about a quarter- to a half-inch deep in the soil. Kale thrives in direct sunlight, ideally about six hours of full light per day. Kale also loves water, preferring about one to 1.5 inches of watering per week. Mulch is important to keep weeds at bay and prevent erosion. It also provides extra nutrients.

Other greens like arugula, spinach, endive, and certain types of lettuce also can work in the winter.


This root vegetable is famously easy to grow, and that certainly goes for a winter vegetable greenhouse. This one could be a great option for inexperienced gardeners or families with young children.

Use loose, easy-draining soil that’s free of debris like loose stones or wood chips. This is the hardiest of crops, but exposure to direct sunlight will ensure a healthier plant. Keep soil moist, and you can see your radish tops emerging from the ground in as few as five days.

Image used with permission by copyright holder

Green onions

Green onions are a versatile veggie that’s a snap to grow in a winter vegetable greenhouse, as their natural temperature preference nicely overlaps that of an unheated greenhouse.

Plant onions half an inch deep in six-inch-deep flats or another container, using sterile potting soil mix. You’ll want to create a flat, smooth seedbed before you plant. Onions should be about an inch apart, with rows about six inches apart. A floating row cover will make for healthier plants. Keep the soil moist but not too wet, and remove any small flowers that may peek out from the soil. They should be ready to harvest in about 30 days.

A winter vegetable greenhouse can be a source of fun — not to mention vegetables — for both experienced and novice gardeners. You may have to say goodbye to those local strawberries for a while, but sautéed kale is healthier anyway.

The real point for many gardeners, though, may be to simply keep busy during the winter; making full use of their greenhouse is an excellent way to do that.

Editors' Recommendations

Scott Harris
Scott Harris is a freelance writer based near Washington, DC, with more than a decade of experience covering health…
A complete guide to the best lights to choose for your greenhouse
Houseplants under grow lights

Just like growing houseplants indoors, growing plants in a greenhouse requires specific care and a suitable environment. Even though the greenhouse will have some light from the sun coming in, the glass panes are often filtered in some kind of way to prevent your plant’s leaves from scorching. Enter grow lights. They’re used most commonly in darker spaces or during colder months; however, they're greatly beneficial to your greenhouse plants and help ensure that the plants are getting the light they need to thrive.

Can you have an indoor greenhouse?
Absolutely! Indoor greenhouses are revered for how sustainable and inexpensive they can be. An indoor greenhouse with lights can be installed anywhere in the home where you have the space, and it’s a perfect place to grow things like fruits, herbs, and veggies indoors. If you’re only planning to grow a couple herbs, you can get something as small as a tabletop greenhouse! It will fit a few plants, won’t take up too much space, and will add to the aesthetic of a room while letting you grow plants in a unique way.

Read more
Good, better, best: Portable greenhouses for your winter garden
greenhouse in winter

There are many exciting plants to grow in your garden, but not all of them are suited to your particular climate. A greenhouse can significantly extend the range of plants you can grow, as well as what seasons you can start those plants in. A full size greenhouse is expensive and hard to move, but portable greenhouses are much more accessible. There are a lot of factors to consider though, including durability, what materials it’s made of, size, how easy it is to put up and take down, and, of course, cost. If this seems overwhelming, then why not let us do some of the work for you? We’ve got three portable greenhouses for your consideration, with all the factors laid out for you!

Good: Costway Portable Mini Greenhouse
The Costway Portable Mini Greenhouse covers all the essentials of a greenhouse. It's made of clear plastic fitted over a hard plastic frame. The plastic covering is waterproof, and lets in light. It comes with four shelves, two for each side, and has enough floor space for a couple additional potted plants. This greenhouse is easy to assemble and is lightweight enough to be moved easily whenever you need to, weighing only 16 pounds when assembled.

Read more
6 balcony vegetable gardening tips every new gardener needs
container garden

You've likely seen photos of gorgeous raised garden beds with rows and rows of beautiful vegetable plants. Or a luscious and full flower garden with new blooms all year round. As someone who lives in an apartment, these photos can be discouraging. It can feel like you can't achieve those beautiful green spaces with what you have, but we're here to tell you that you can!

Creating a balcony garden can be as simple or as complex as you want it to be. Whether you have a walk-out patio with space for tables and chairs or just a small space to stand, you can transform these spaces into garden sanctuaries. So stop feeling like you have to wait until you have a backyard or more acres; beautiful gardens can come from small spaces too, and here's how you do it.

Read more