Best vegetables to grow in Pennsylvania winter include cold-hardy greens that survive under row covers. If you live in the Keystone State, you know winters can be harsh, with freezing temps and snow. But that doesn’t mean your garden has to go completely dormant. With a little planning, you can harvest fresh veggies straight through the cold months. This guide covers the top picks for your Pennsylvania winter garden, along with tips to keep them thriving.
Pennsylvania spans USDA zones 5a to 7b, so your specific microclimate matters. The eastern part near Philly is milder, while the mountains get brutal cold. Still, many vegetables are tough enough to handle it. You just need to know what to plant and how to protect it.
Best Vegetables To Grow In Pennsylvania Winter
Let’s get right into the list. These are the most reliable choices for a Pennsylvania winter garden. They can handle frost, snow, and even some ice. Most of them actually taste sweeter after a light freeze.
Kale
Kale is a superstar for winter growing. It thrives in cold weather and gets sweeter after frost. Varieties like Winterbor, Red Russian, and Lacinato are top picks. Plant them in late summer or early fall for a winter harvest.
- Hardy down to about 10°F
- Needs full sun but tolerates partial shade
- Harvest outer leaves as needed
- Use row covers for extra protection
Spinach
Spinach is another cold-hardy champ. It can survive temps as low as 15°F with some protection. Varieties like Bloomsdale and Winter Giant are bred for cold. Sow seeds in early fall for a winter crop.
- Prefers well-drained soil
- Keep soil moist but not soggy
- Mulch around plants to insulate roots
- Harvest leaves when they reach full size
Collard Greens
Collards are tough as nails. They can handle frost and even light snow. They taste better after a freeze too. Georgia Southern and Vates are good choices for Pennsylvania.
- Space plants 18-24 inches apart
- Water deeply but infrequently
- Harvest lower leaves first
- Can survive down to 20°F
Carrots
Carrots are perfect for winter storage in the ground. They get sweeter as the soil cools. Varieties like Napoli and Bolero are cold-tolerant. Plant them in mid-summer for a winter harvest.
- Mulch heavily to prevent freezing
- Harvest as needed through winter
- Can survive under snow cover
- Flavor improves with cold
Garlic
Garlic is planted in fall and harvested in summer. It needs a cold period to form bulbs. Hardneck varieties like Music and German Extra Hardy work well in Pennsylvania.
- Plant cloves 4-6 inches apart
- Mulch with straw for winter protection
- Harvest when leaves start to yellow
- Requires full sun
Mache (Corn Salad)
Mache is a lesser-known green that thrives in cold. It has a mild, nutty flavor. It can survive temps down to 5°F. Sow seeds in early fall for winter harvests.
- Grows in low light conditions
- Needs minimal care
- Harvest whole rosettes
- Perfect for salads
Turnips
Turnips are dual-purpose: you get both roots and greens. They handle frost well. Varieties like Purple Top White Globe and Hakurei are reliable. Plant in late summer for winter roots.
- Thin seedlings to 4 inches apart
- Harvest roots when 2-3 inches wide
- Greens are edible and nutritious
- Store in ground with mulch
Brussels Sprouts
Brussels sprouts need a long growing season but are very cold-hardy. They taste best after a frost. Varieties like Long Island Improved and Churchill work well.
- Start seeds indoors in spring
- Transplant in early summer
- Harvest sprouts from bottom up
- Can survive down to 20°F
Leeks
Leeks are cold-tolerant and can stay in the ground all winter. Varieties like King Richard and Bandit are good choices. They need a long growing season but are worth it.
- Plant in spring for winter harvest
- Hill soil around stems for white shafts
- Harvest as needed
- Mulch for extra protection
Parsnips
Parsnips are like carrots but even sweeter after a freeze. They need a long season to mature. Varieties like Hollow Crown and Harris Model are reliable.
- Sow seeds in spring
- Thin to 3-4 inches apart
- Harvest after first frost
- Store in ground with mulch
How To Protect Your Winter Vegetables
Even cold-hardy vegetables need some help in Pennsylvania winters. Here are the best ways to protect them.
Use Row Covers
Row covers are lightweight fabric that traps heat. They can add 5-10°F of protection. Use them on cold nights and remove them on sunny days.
- Floating row covers are easy to use
- Secure edges with soil or rocks
- Remove during warm spells
- Reusable for multiple seasons
Apply Mulch
Mulch insulates the soil and protects roots. Use straw, leaves, or wood chips. Apply a 4-6 inch layer around plants.
- Straw is best for vegetable gardens
- Avoid using hay with seeds
- Mulch after the ground freezes
- Remove in spring when soil warms
Build Cold Frames
Cold frames are like mini greenhouses. They trap solar heat and protect plants from wind. You can buy them or build your own.
- Use old windows or clear plastic
- Angle the frame toward the sun
- Ventilate on warm days
- Place over raised beds
Use Hoop Houses
Hoop houses are larger than cold frames. They use PVC pipes and plastic sheeting. They can extend your growing season by weeks.
- Simple to construct
- Allows access to plants
- Can be temporary or permanent
- Great for multiple rows
When To Plant For Winter Harvest
Timing is everything for a winter garden. You need to plant early enough so vegetables mature before the deep cold sets in.
Late Summer Plantings (August-September)
These are for vegetables that need time to grow. Kale, collards, and Brussels sprouts should be planted by mid-August. Carrots and parsnips need to be in by early August.
- Check your first frost date
- Count back from that date
- Add extra time for slower growth
- Use succession planting for continuous harvest
Early Fall Plantings (September-October)
These are for fast-growing greens. Spinach, mache, and turnips can be planted in September. Garlic goes in the ground in October.
- Soil should still be warm
- Water regularly until frost
- Apply mulch after first freeze
- Harvest as needed through winter
Soil Preparation For Winter Gardens
Good soil is the foundation of any garden. For winter vegetables, you need soil that drains well and holds nutrients.
Test Your Soil
Test your soil pH and nutrient levels. Most vegetables prefer a pH between 6.0 and 7.0. Add lime if needed to raise pH.
- Use a home test kit
- Send samples to a lab
- Amend based on results
- Test every 2-3 years
Add Organic Matter
Compost improves soil structure and fertility. Add 2-3 inches of compost before planting. Work it into the top 6 inches of soil.
- Use well-rotted compost
- Avoid fresh manure
- Mix in aged leaf mold
- Top-dress with compost in winter
Ensure Good Drainage
Winter vegetables hate wet feet. Raised beds improve drainage. If your soil is clay, add sand or perlite.
- Build raised beds 6-12 inches high
- Use organic matter to loosen clay
- Avoid walking on wet soil
- Install drainage tiles if needed
Common Challenges In Pennsylvania Winter Gardens
Winter gardening isn’t without its problems. Here’s what to watch for and how to handle it.
Frost Heaving
Frost heaving pushes plants out of the ground. It happens when soil freezes and thaws. Mulch helps prevent this.
- Apply mulch after ground freezes
- Use row covers on cold nights
- Plant deep enough
- Check plants after thaws
Snow Damage
Heavy snow can break plants. Brush snow off gently. Use hoops or cages to support tall plants.
- Shake snow off carefully
- Use supports for Brussels sprouts
- Remove heavy snow from covers
- Let light snow stay as insulation
Pests
Some pests are active in winter. Aphids and slugs can be problems under row covers. Check plants regularly.
- Use insecticidal soap for aphids
- Handpick slugs at night
- Remove dead plant material
- Rotate crops yearly
Deer And Rabbits
Hungry animals will eat your winter garden. Fencing is the best defense. Use 4-foot fences for rabbits and 8-foot for deer.
- Install fencing before planting
- Use chicken wire for small animals
- Apply repellents as needed
- Remove attractants like fallen fruit
Harvesting Winter Vegetables
Harvesting in winter is different than in summer. You need to work around the weather.
When To Harvest
Harvest on mild days when the ground isn’t frozen. Use a garden fork to loosen roots. Cut greens with a knife.
- Harvest in the morning
- Avoid harvesting in rain or snow
- Leave roots in ground until needed
- Store harvested vegetables properly
How To Store
Some vegetables store better than others. Root vegetables can stay in the ground. Greens need to be used quickly.
- Store carrots in damp sand
- Keep greens in the fridge
- Freeze excess kale or spinach
- Can or pickle turnips
Frequently Asked Questions
What vegetables grow best in Pennsylvania winter?
Kale, spinach, collards, carrots, and garlic are top choices. They are all cold-hardy and can survive frost with protection.
Can you grow vegetables in Pennsylvania in December?
Yes, with proper planning and protection. Cold-hardy greens like mache and kale can be harvested in December under row covers.
Do I need a greenhouse for winter gardening in Pennsylvania?
No, but it helps. Row covers, cold frames, and mulch can protect vegetables without a greenhouse. Many gardeners use simple structures.
When should I start planting for a winter garden in Pennsylvania?
Start in late summer for slow-growing crops like carrots and Brussels sprouts. Plant fast-growing greens in early fall.
How do I protect my winter garden from snow?
Use row covers or cold frames to keep snow off plants. Brush heavy snow off gently. Light snow can act as insulation.
Winter gardening in Pennsylvania is totally doable. You just need the right vegetables and a bit of planning. Start with kale and spinach, then add carrots and garlic. Use row covers and mulch to protect your plants. Before you know it, you’ll be eating fresh salads in January. Give it a try this year and see how rewarding it can be.