Most gardeners think of growing season as the frost-free months and treat winter as downtime. But with smart planning, you can have something growing, germinating, or being harvested in every month of the year. This guide breaks down the gardening year month by month, covering what to start indoors, what to direct sow, what to harvest, and how to prepare for the season ahead.
Winter (January - February): Plan and Start Seeds
January
January is planning month. Order seeds, review last year's notes, and sketch your garden layout. In zones 9 to 11, this is prime planting time: direct sow peas, lettuce, spinach, and kale outdoors. In colder zones, start onion seeds indoors under grow lights. Onions need a long indoor start (10 to 12 weeks before transplanting) to develop full-size bulbs.
February
Start peppers indoors in zones 5 to 8. Peppers are slow growers and need 8 to 10 weeks of indoor time before transplanting. Begin starting tomatoes indoors in zones 7 to 8 (wait until March for zones 5 to 6). In mild climates, direct sow cool-season crops and plant potatoes in late February.
Spring (March - May): The Main Planting Season
March
Spring arrives in earnest. In zones 6 to 8, direct sow peas, lettuce, spinach, radish, and arugula outdoors as soon as the soil can be worked. Start tomatoes and eggplant indoors in zones 5 to 6. In zones 9 to 11, transplant warm-season crops like tomatoes and peppers, which are already past frost risk.
April
The busiest month in the garden. Continue direct sowing cool-season crops. Start cucumbers, squash, and melons indoors in colder zones. In zones 7 and above, begin transplanting tomatoes and peppers after the last frost date. Plant seed potatoes, onion sets, and asparagus crowns. This is also the time to prepare beds with compost and plan your succession planting schedule.
May
After the last frost in zones 5 to 7, transplant all warm-season crops: tomatoes, peppers, cucumbers, squash, and herbs like basil. Direct sow beans, corn, and sunflowers. Set up trellises for cucumbers and pole beans. Begin succession sowing lettuce and radish every two weeks for continuous harvest through summer.
Summer (June - August): Maintain and Harvest
June
Summer crops are growing rapidly. Focus on watering consistently (1 to 2 inches per week), mulching to conserve moisture, and watching for pests. Harvest spring-planted lettuce, spinach, peas, and radish before they bolt in the heat. Direct sow a second round of beans for a late-summer harvest. In zones 9 to 11, plant heat-loving crops like sweet potatoes and okra.
July
Peak harvest season. Tomatoes, cucumbers, zucchini, beans, and peppers are producing heavily. Harvest daily to encourage continued production. Begin planning your fall garden: order seeds for kale, broccoli, Brussels sprouts, and fall lettuce. Start fall brassicas indoors 8 to 10 weeks before your first frost date.
August
The transition month. Summer crops are still producing but the fall garden begins. Direct sow lettuce, spinach, radish, and arugula for fall harvest (timing depends on your first frost date). Transplant fall broccoli, cauliflower, and kale seedlings started in July. Plant garlic cloves in zones 9 to 11 (colder zones wait until October).
Fall (September - November): Second Harvest and Preparation
September
Fall cool-season crops are growing. Continue harvesting tomatoes and peppers before frost. Direct sow a final round of quick-maturing crops like radish and arugula. In zones 5 to 7, cover tender crops with row covers on cold nights to extend the harvest by 2 to 4 weeks.
October
Plant garlic cloves in zones 4 to 8. Garlic needs a cold winter to develop properly and is planted in fall for harvest the following summer. Clean up spent summer crops and add them to the compost pile. Plant cover crops (winter rye, crimson clover) in empty beds to protect soil over winter and add nitrogen. Harvest fall kale, broccoli, and Brussels sprouts.
November
In zones 7 and above, cool-season crops like kale, spinach, and lettuce can still be harvested through November and often into December with row cover protection. In colder zones, the outdoor season is over. Mulch garlic beds, put tools away, and begin reviewing the season's successes and failures. Start planning next year's garden.
December: Rest and Reflect
December is for reviewing seed catalogs, analyzing what worked, and ordering early for the best selection. In zones 9 to 11, the cool-season garden is in full production. In cold climates, cold frames and unheated greenhouses can extend leafy green harvests through the darkest months.
Cover Crops: Feeding Your Soil in the Off-Season
Empty beds during winter lose nutrients and structure. Cover crops solve this by protecting topsoil from erosion, suppressing weeds, and adding organic matter when turned under in spring. Winter rye grows in cold weather and breaks up compacted soil. Crimson clover fixes atmospheric nitrogen into plant-available form. Austrian winter peas combine nitrogen fixation with vigorous biomass production. Sow cover crops 4 to 6 weeks before your first fall frost.
Season Extension: Growing Beyond Your Frost Dates
Row covers, cold frames, and low tunnels can add 4 to 8 weeks to both ends of your growing season. A simple cold frame made from a recycled window over a raised bed can keep lettuce, spinach, and kale alive through zone 5 winters. Low tunnels made from hoops and greenhouse plastic protect crops from frost and create a greenhouse effect that warms soil and air. In zones 6 and above, a well-managed cold frame can produce salad greens year-round.
Find your city's specific planting calendar at GrowByCity. Each guide includes month-by-month recommendations based on your local climate data, frost dates, and growing season length.