USDA Hardiness Zone

Zone 3 Planting Guide

Very cold zone with a short but intense growing season of roughly 90–120 days. Warm-season crops like tomatoes need to be started indoors early and transplanted after last frost. Cool-season crops thrive in the long, cool springs and falls. Season extension is highly recommended.

🌡️ Winter Low: -40 to -30°F ☀️ Summer High: 70–90°F 🔄 1 Growing Cycle/Year
Frost Risk
high
Heat Concern
none
Grow Cycles
1/yr
Shade Cloth
Optional

What to Grow in Zone 3

Zone 3 supports 95 plants across multiple growing seasons. Here are some of the best options for your garden.

Spring Plants

Lettuce 35–60 days · Both Spinach 35–50 days · Direct sow Radishes 25–35 days · Direct sow Potatoes 75–120 days · Tuber Green Onions 50–70 days · Both Snap Peas 55–70 days · Direct sow Cilantro 25–45 days · Direct sow Dill 40–60 days · Direct sow Arugula 20–40 days · Direct sow Nasturtiums 50–65 days · Direct sow Asparagus 730+ days · Transplant Borage 50–60 days · Direct sow

Summer Plants

Tomatoes 60–90 days · Transplant Cherry Tomatoes 55–75 days · Transplant Roma Tomatoes 70–80 days · Transplant Bell Peppers 65–90 days · Transplant Hot Peppers 65–90 days · Transplant Jalapeños 65–90 days · Transplant Habanero Peppers 75–100 days · Transplant Cucumbers 50–70 days · Both Zucchini 45–60 days · Both Summer/Winter Squash 50–100 days · Both Kale 50–65 days · Both Swiss Chard 45–60 days · Both

Fall Plants

Green Onions 50–70 days · Both Garlic 210–240 days · Cloves

Year-Round Plants

Artichokes 150–180 days · Transplant

Garden Kits for Zone 3

These curated plant collections are designed to work in your zone.

🌶️
Salsa Box
Everything for fresh homemade salsa, all season long.
5 plants
 🥗
Salad Lovers
Fresh salad greens and toppings straight from your garden.
6 plants
 🥕
Kid-Friendly Crunch
High-engagement crops kids love to pick and eat.
5 plants
 🥬
Smoothie Greens
Nutrient-packed greens for smoothies and juicing.
4 plants
 🌿
Herb Heaven
The essential culinary herb collection.
5 plants
 🇲🇹
Italian Feast
Classic Italian garden: tomatoes, basil, zucchini, and garlic.
5 plants
 🌮
Taco Night
Grow your own taco toppings: fresh lettuce, tomatoes, peppers, and cilantro.
5 plants
 ☀️
Summer Bounty
The best of summer: cucumbers, peppers, eggplant, and basil.
4 plants
 🐝
Pollinator Paradise
Flowers that attract pollinators and look gorgeous in your garden beds.
4 plants
 🌈
Beautiful Foods
Colorful, photogenic crops that look as good as they taste.
6 plants
 🥦
Brassica Box
The cool-season powerhouse: broccoli, cauliflower, kale, and more.
8 plants
 🍿
Snack Garden
Grab-and-go snacking crops the whole family will graze on.
4 plants
 🍓
Strawberry Patch
A dedicated strawberry bed with companion flowers and herbs.
3 plants
 🇱🇪
Mediterranean
Sun-loving flavors of the Mediterranean: eggplant, tomatoes, and fresh herbs.
5 plants
 🍸
Happy Hour
Cocktail garden essentials: fresh herbs and garnish crops for drinks.
5 plants
 🥢
Asian Stir Fry
Stir fry essentials: bok choy, scallions, cilantro, snow peas, and Thai basil.
5 plants

Create Your Own Plant Playlist

Use our kit themes as a starting point and build a custom planting plan for your garden.

Create a Playlist

Growing Tips for Zone 3

❄️ Frost Protection
Zone 3 has high frost risk. Cover tender plants when overnight lows drop below 35°F. Use row covers, cloches, or bring containers indoors.
🪲 Common Pests
Watch for: cabbage worms, aphids, flea beetles, Colorado potato beetle. Use companion planting and row covers as first-line defense.

Frequently Asked Questions

What grows best in Zone 3?
Zone 3 supports 95 different plants. Popular choices include tomatoes, peppers, herbs, and leafy greens. The best picks depend on the season — warm-season crops thrive in spring/summer while cool-season crops do better in fall/winter.
What is USDA Hardiness Zone 3?
USDA Zone 3 has winter lows of -40 to -30°F and summer highs of 70–90°F. Frost risk is high and heat concern is none. You can expect 1 growing cycle per year.
When should I start planting in Zone 3?
Timing varies by crop. Cool-season crops can often be started in early spring or fall. Warm-season crops should wait until after the last frost risk passes. Check our individual plant guides for zone-specific planting windows.
Do I need shade cloth in Zone 3?
Shade cloth is generally not necessary in Zone 3, though it can help if you're growing cool-season crops during warmer months.

Explore Other Zones

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