When to Plant in Billings, MT

The city of Billings, located in Montana, experiences its median last spring frost on May 8 and its median first fall frost on September 27, providing a total of 142 frost-free days. This unique timeline allows gardeners to plan effectively, utilizing the growing season to its fullest potential while being mindful of the significant temperature variations that can occur, particularly during the spring and fall months.

Billings is characterized by a continental mountain microclimate, marked by cold nights and intense sun during the daytime. This climate allows certain crops, such as potatoes, peas, and carrots, to thrive due to the cool evenings and warm days, which promote steady growth without risking bolting. However, crops such as basil and cucumbers may struggle due to the chilly nights, which can hinder their growth and development, making them less suited to this environment.

What to plant now in Billings

In early spring (March to early April), consider planting cold-tolerant crops such as peas and spinach. These can be sown as soon as the soil is workable, usually a few weeks before the last frost date of May 8.
Late spring (mid-April to early June) is perfect for planting warm-season crops like tomatoes and peppers. Start these seedlings indoors and transplant them post-May 8 to ensure optimal growth without frost damage.
During summer (June to early July), focus on maintaining and harvesting the crops you have planted earlier. This is also a critical time to sow quick-maturing crops like radishes and green beans, benefiting from the long days before the first fall frost approaches.
In fall (mid-September to late October), as the frost date of September 27 approaches, harvest your crops promptly. You can also plant cover crops to improve soil health for the next growing season, ensuring your garden is ready come spring.

In Billings (142 frost-free days, a moderate season), 38 of 56 planner crops fit outright, 17 get two plantings, 1 crop is perennial.

Month by month in Billings

Month	What to do
January	This month is about planning and preparation. Start researching the types of plants that thrive in Billings and considering what you would like to grow in the upcoming seasons.
February	As winter progresses, begin to prepare your gardening tools and supplies. Consider starting seeds indoors for early spring vegetables to get a head start.
March	In March, as the soil starts to thaw, it’s time to plant cool-season crops like peas and spinach. Ensure the soil is workable, preparing for the last frost on May 8.
April	April is crucial for sowing seeds of vegetables that can bear cool temperatures. This is also the month to prepare for the transition into warmer crops post-May 8.
May	With the last spring frost occurring around May 8, be ready to transplant warm-season vegetables like tomatoes and peppers after this date, maximizing the growing season ahead.
June	June offers long sunny days perfect for growing. Focus on watering and maintaining your crops while considering planting quick-maturing vegetables for a successful harvest.
July	As summer peaks, continue caring for your garden. This is a great time to sow more radishes and beans, taking advantage of the warm conditions ahead of the frost date.
August	In August, prepare for the fall harvest. Start to monitor the maturity of your crops and think about what can be planted now to yield in the fall before the frost.
September	As we approach the first fall frost on September 27, focus on harvesting your crops promptly and consider planting cover crops to enrich your soil for next season.
October	October is primarily for cleanup and preparation for winter. Remove dead plants and mulch your garden beds to protect soil health during the colder months.
November	In November, the gardening season in Billings wraps up. It's time for reflection and preparation for next year, making notes on what worked well and the plants you want to try.
December	During December, take a break from gardening, but keep planning. Research which crops to begin indoors early next year and winterize your tools and equipment.

Frost dates for Billings ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
59102	May 8	September 27	5a
59101	May 8	September 27	5a

FAQ

When is the last frost in Billings?

The last frost in Billings typically occurs on May 8, marking an important date for gardeners to prepare their plants.

What vegetables grow best in Billings?

Vegetables such as potatoes, peas, and carrots thrive in Billings' climate due to cool nights and warm days, while basil and cucumbers tend to struggle.

When should I plant tomatoes in Billings?

Tomatoes should be planted after the last frost date of May 8 to avoid frost damage, ideally in late May.

Can I garden year-round in Billings?

Gardening year-round is challenging due to the continental mountain climate; however, fall crops and winterizing techniques can extend your gardening season.

How does Plan My Garden help Billings gardeners?

Plan My Garden provides tailored advice, planting calendars, and local climate insights specifically for Billings gardeners to optimize their gardening efforts.