When to Plant in Madison, WI

In Madison, Wisconsin, the gardening calendar is primarily influenced by the last spring frost date of May 10 and the first fall frost date of October 2, resulting in an average of 145 frost-free days each year. This window is essential for planning your planting schedules, particularly for choices like vegetables, flowers, and herbs that thrive in this duration. Understanding these frost dates allows gardeners to make informed decisions, ensuring that their plants have the best chance to mature before the cold weather sets in again.

The humid continental Great Plains microclimate of Madison creates a unique environment for gardeners. Crops such as tomatoes, peppers, and corn excel here due to the warm summers and adequate rainfall, which provide ideal growing conditions. Conversely, more delicate plants like tender herbs (e.g., basil) and certain fruits (e.g., strawberries) may struggle because the risk of frost can hinder their development and yield. The cool nighttime temperatures, particularly in early spring and late fall, can also pose challenges for these more sensitive crops.

What to plant now in Madison

Now is the time to plant cool-season vegetables like spinach and lettuce, which can be sown outdoors as soon as the soil can be worked in early April, well before the last frost on May 10.
As we move into late spring, prepare to transplant warm-season crops such as tomatoes and peppers in the garden after May 10. It's crucial to wait for the last frost to ensure their survival and growth.
During the height of summer, focus on maintaining your crops and begin thinking about autumn harvests. Start direct-seeding crops like fall radishes and turnips in late July to get a jump on your fall planting before the frost returns.
As fall approaches, be prepared for the first frost date on October 2. It’s essential to harvest remaining crops by mid-September to ensure they are collected before the cold weather halts their growth.

In Madison (145 frost-free days, a moderate season), 37 of 56 planner crops fit outright, 18 get two plantings, 1 crop is perennial.

Month by month in Madison

Month	What to do
January	In January, gardeners in Madison should focus on planning and ordering seeds. It's also a great time to research and select new varieties of vegetables and flowers for the coming planting season.
February	February is a good time to start seedlings indoors for early crops. Consider starting tomatoes and peppers about 6-8 weeks before the last frost date of May 10.
March	As March begins, prepare your garden beds and clean up any debris from winter. If the soil is workable, you can start planting cool-season crops like peas and onions toward the end of the month.
April	In April, focus on finishing your spring planting. It's also wise to monitor the weather closely, as the last frost on May 10 can still pose a risk, especially early in the month.
May	May is pivotal for gardeners in Madison. With the last frost date on May 10, finish planting warm-season crops after this date, including tomatoes, peppers, and basil.
June	In June, your garden should be thriving with established plants. Continue regular watering and weeding. Consider adding mulch to conserve moisture and suppress weeds in the heat of the summer.
July	As July rolls in, monitor your plants for pests and diseases. This is also a good time to sow leafy greens for a fall harvest and prepare for late summer planting.
August	August is suitable for sowing fall crops like carrots and beets. Ensure you take advantage of the warm weather while planning for the upcoming frost transition in October.
September	In September, be vigilant as frost approaches. Harvest mature crops and consider planting a late-season cover crop to enhance soil fertility and prevent erosion.
October	October brings cooler temperatures and the first frost date on October 2. Ensure that all harvests are completed before this date to avoid losing crops to frost damage.
November	November is typically a time for closing down the garden for winter. Clean up remaining debris, which can harbor pests, and consider planting a winter cover crop if conditions allow.
December	In December, focus on planning and reflecting on your gardening successes and challenges from the past year. Use this downtime to dream about what to plant in the upcoming spring.

Frost dates for Madison ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
53711	May 10	October 2	5b
53703	May 10	October 2	5b
53792	May 10	October 2	5a

FAQ

When is the last frost in Madison?

The last frost date in Madison is May 10, so it’s crucial to plan your planting around this date to ensure your crops thrive.

What vegetables grow best in Madison?

Some of the best vegetables for Madison include tomatoes, peppers, and corn, which thrive in the warm summer conditions. Cool-season crops such as peas and lettuce also grow well in the spring.

When should I plant tomatoes in Madison?

Tomatoes should be planted after the last frost date of May 10 to ensure they have the best chance to flourish in the warm summer weather.

Can I garden year-round in Madison?

Gardening year-round in Madison is challenging due to frost and winter conditions. However, some winter gardening options like certain cold frames or indoor gardening can extend your gardening season.

How does Plan My Garden help Madison gardeners?

Plan My Garden provides tailored resources and tools to help gardeners in Madison make the most of their specific climate conditions, ensuring successful planting and harvesting.