When to Plant in Fairfax, VA

In Fairfax, Virginia, the gardening calendar is framed by the median last spring frost date of April 15 and the median first fall frost on October 23, allowing for a total of 191 frost-free days each year. These dates are crucial for determining when to plant various crops, ensuring they have adequate time to grow before the temperatures drop again. Gardeners in this area can plan their planting strategies around these frost dates to optimize their harvests, taking advantage of the warm growing periods while also being mindful of the potential for late frosts in spring and early ones in fall.

The humid temperate (4 distinct seasons) microclimate of Fairfax is conducive for growing a variety of crops. Vegetables such as tomatoes, peppers, and corn thrive in this environment, benefiting from the long growing season, abundant rainfall, and warm summers. Conversely, crops like eggplants and some cold-hardy greens may struggle, particularly in the early spring when temperatures can still dip, causing slower growth and potential damage from unexpected frosts. Understanding this climate will help local gardeners choose plants that are well-suited to their environment.

What to plant now in Fairfax

In early spring (March to April 15), it's ideal to start planting cool-weather crops like spinach and peas, making sure to get them in before the last frost date of April 15 for an early harvest.
Late spring (April 15 to June) is perfect for sowing warm-season crops such as tomatoes and squash. Plant them after the last frost date to ensure they thrive in the warm temperatures.
Summer (June to August) is the time to nurture your warm-season plants, including cucumbers and beans. This is generally a maintenance phase; keep the soil moist and watch for pests.
In fall (August to October 23), consider planting fall crops like kale and radishes. Aim to get these into the ground by early August to ensure they mature before the first fall frost on October 23.

In Fairfax (191 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.

Month by month in Fairfax

Month	What to do
January	January is a quiet month in the garden. This is a good time to plan your garden layout for the year, order seeds and take stock of gardening tools and supplies. Start planning for the planting season.
February	As the days begin to lengthen, February is an excellent month to start seeds indoors. Focus on tomatoes and peppers, which will benefit from an early start. Prepare garden beds if the ground is manageable.
March	March brings the first signs of spring. Start sowing cool-season crops like lettuce and peas directly in the ground, but be prepared for unexpected frosts. Monitor the weather closely as April 15 approaches.
April	April marks the transition towards warmer weather. By April 15, the last frost is typically expected. Make sure to plant your warm-weather crops after this date, such as tomatoes and squash.
May	In May, the chances of frost are minimal. Continue planting warm-weather crops and start fertilizing your spring greens. Regular watering is crucial as temperatures rise and plants begin to grow vigorously.
June	June ushers in summer, with long days and warm temperatures. This is an excellent month for maintaining your garden. Keep up with watering and start harvesting early crops like lettuce.
July	July is often hot and humid. Focus on caring for established plants, keeping them well-watered, and consider implementing pest control measures. It's also time to plant second crops of beans and squash.
August	August can be challenging with high temperatures. Continue to care for your summer crops. Assess your garden for fall planting near the end of the month, preparing for the cool-weather crops.
September	As September arrives, it’s time to plant fall crops. Consider sowing spinach and kale to mature before the first fall frost on October 23. Keep an eye on nighttime temperatures.
October	October signifies the end of the growing season in Fairfax. Harvest remaining crops and prepare your garden for winter. Protect sensitive plants from the potential frost that will come after October 23.
November	November is primarily a cleanup month. Remove any spent plants and mulch beds to protect the soil during the winter months. Plan for spring planting as the colder weather sets in.
December	December is a time for rest and reflection in the garden. Use this month to dream about next year's garden, researching new plant varieties and methods to improve your gardening practices.

Frost dates for Fairfax ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
22030	April 15	October 23	7b
22032	April 15	October 23	7b

FAQ

When is the last frost in Fairfax?

The last frost in Fairfax typically occurs on April 15, making it essential for gardeners to plan their spring planting accordingly to maximize their growing season.

What vegetables grow best in Fairfax?

Vegetables that grow best in Fairfax include tomatoes, peppers, and corn, all thriving in the humid temperate (4 distinct seasons) climate. These crops enjoy the warm summers and extended frost-free days.

When should I plant tomatoes in Fairfax?

Tomatoes should be planted after the last frost date of April 15. For best results, aim to transplant young tomato plants started indoors by late May to ensure they flourish.

Can I garden year-round in Fairfax?

While gardening year-round can be challenging, you can grow certain cool-weather crops during fall and winter. Choose appropriate varieties and provide some protection to succeed.

How does Plan My Garden help Fairfax gardeners?

Plan My Garden assists Fairfax gardeners by providing tailored planting calendars, climate-specific advice, and resources to optimize their gardening efforts based on local frost dates.