Zone 3 Planting Calendar

Gardening in USDA Zone 3, presents unique challenges due to its short growing season. However, with careful planning, you can successfully grow a variety of vegetables. Here’s a comprehensive guide to help you navigate planting and harvesting in Zone 3


Zone 3 Vegetable Planting & Harvesting Guide

Frost Dates

Last Frost (Spring): Approximately May 15

First Frost (Fall): Approximately September 15

Growing Season: Approximately 90–100 frost-free days

Planting & Harvesting Timeline

MonthActivities
FebruaryStart seeds indoors for cold-tolerant crops like onions, celery, and asparagus.
MarchBegin seeds indoors for broccoli, cabbage, cauliflower, and lettuce.
AprilDirect sow outdoors: peas, spinach, radishes, and kale. Start seeds indoors for tomatoes and peppers.
MayTransplant seedlings outdoors after the last frost. Direct sow beans, corn, cucumbers, and squash.
JuneContinue sowing beans, corn, and summer squash.
JulyStart fall crops like kale, chard, and turnips.
AugustPlant spinach, lettuce, and radishes for a fall harvest.
SeptemberHarvest late-season crops.

Recommended Vegetables for Zone 3

VegetablePlanting MethodNotes
BroccoliStart indoorsCold-hardy, ideal for early spring and fall planting.
CabbageStart indoorsThrives in cool temperatures; harvest before first frost.
CarrotsDirect sowBest planted early; can be harvested before frost.
KaleDirect sowCold-tolerant; can be harvested into late fall.
LettuceDirect sowQuick-growing; suitable for multiple plantings.
PeasDirect sowPlant early; harvest before hot weather.
RadishesDirect sowFast-growing; ideal for early spring planting.
SpinachDirect sowCold-hardy; suitable for spring and fall planting.
TurnipsDirect sowGrows well in cool temperatures; harvest before frost.

Additional Tips for Zone 3 Gardeners

Start Seeds Indoors: Given the short growing season, starting seeds indoors for crops like tomatoes, peppers, and eggplants is essential.

Use Season Extenders: Employ row covers, cold frames, or greenhouses to protect plants from late frosts and extend the growing season.

Choose Cold-Hardy Varieties: Opt for vegetable varieties known for their cold tolerance to ensure successful growth and harvests.

Monitor Frost Dates: Keep track of local frost dates to plan planting and harvesting schedules effectively.