USDA Zone 4A
Cold winters. Upper Midwest, northern New England, high-elevation mountain areas. Reliable snow cover protects perennials.
Temperature Range
What Does Zone 4A Mean?
USDA Hardiness Zone 4A means your area's average annual extreme minimum winter temperature falls between -30°F to -25°F (-34°C to -32°C). This is the coldest temperature you can typically expect in a normal winter, based on 30 years of climate data.
Your zone primarily determines which perennial plants (trees, shrubs, perennial flowers, and fruit bushes) can survive outdoors year-round. It's also strongly correlated with your frost dates, which are the foundation for calculating when to plant annual vegetables and flowers. Learn more about what hardiness zones mean.
Enter your zip code on our homepage tool to see personalized planting dates for all 50 plants based on your specific location within Zone 4A.
States in Zone 4A
These states contain areas classified as Zone 4A:
Best Plants for Zone 4A
These plants are well-suited to Zone 4A conditions. Click any plant for detailed growing information and state-specific planting dates.
Kale
The toughest green in the garden. Kale laughs at frost and actually tastes...
Root VegetableGarlic
Plant in fall, harvest in summer. Garlic is one of the most rewarding crops for...
Root VegetablePotatoes
Incredibly satisfying to grow. There's nothing quite like digging up your own...
Cool-Season VegetablePeas
One of the earliest crops you can plant. Kids love picking and eating them...
Root VegetableCarrots
Patience is the secret ingredient. Carrots are slow to germinate but deliver...
Root VegetableBeets
Two crops in one — eat the roots and the greens. Beets are cold-hardy and...
Cool-Season VegetableBroccoli
A nutrition powerhouse that thrives in cool weather. Harvest the main head,...
Cool-Season VegetableLettuce
Fast-growing and forgiving. Plant in spring and fall for a nearly year-round...
Root VegetableRadishes
The fastest vegetable in the garden — some varieties are ready in just 25 days....
Cool-Season VegetableSpinach
Fast from seed to salad. Spinach bolts in heat, so plant early in spring and...
BulbDaffodils
Deer-proof, squirrel-proof, and virtually indestructible. Daffodils naturalize...
Perennial VegetableRhubarb
Cold-climate perennial producing tart, red stalks for pies and sauces. Thrives...
Frequently Asked Questions
Start seeds indoors 6-8 weeks before your last frost. Use black plastic mulch to warm soil before transplanting — it can raise soil temperature by 5-10°F. Row covers protect from late frosts and add warmth. Cold frames extend fall harvest by 4-6 weeks. Many Zone 4A gardeners get a full extra month of production with these tools.
Cold-hardy crops (peas, lettuce, spinach, radishes) can go out 3-4 weeks before your last frost — typically late April to mid-May depending on your specific location. Frost-sensitive crops (tomatoes, peppers, squash) wait until at least 2 weeks after. Soil temperature matters more than air temperature — wait for 60°F soil for warm-season crops.