When to Plant in Tulsa, OK

In Tulsa, Oklahoma, the gardening calendar is shaped by the median last spring frost date of April 2 and the median first fall frost date of October 28, providing approximately 209 frost-free days. This extended growing period allows gardeners to cultivate a diverse array of vegetables and flowering plants, optimizing their gardens throughout the spring and summer months.

The humid subtropical microclimate plays a pivotal role in defining what can thrive in Tulsa gardens. Crops such as tomatoes, peppers, and corn are especially suited to this climate due to their tolerance for the heat and occasional drought conditions. Conversely, crops like lettuce and radishes can struggle here, particularly in the heat of summer that can lead to bolting and a rapid decline in growth.

What to plant now in Tulsa

Spring: Start planting cool-season crops such as peas and lettuce outdoors after April 2. These crops can be sown until early May, taking advantage of the extended frost-free period.
Summer: As temperatures rise, focus on heat-loving plants. Plant seeds for tomatoes and peppers after the last frost for optimal growth. Aim to have these in the ground by mid-May.
Fall: Transition to fall crops as temperatures begin to cool. Plant fall greens like kale and spinach by mid-August to ensure growth before the October 28 frost.
Winter: Maintenance is key in winter. Clean up your garden and prepare beds for spring planting to ensure a smooth transition once the frost lifts in early April.

In Tulsa (209 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 Tulsa

Month	What to do
January	In January, it’s essential to start planning your spring garden. Begin by selecting which seeds you want to grow and order them in preparation for the upcoming planting season.
February	During February, consider starting seeds indoors for warm-season crops such as tomatoes and peppers. This jump-start allows for earlier transplanting once the danger of frost passes.
March	March is the time to prepare your garden beds. Begin sowing cool-weather crops like radishes and peas outdoors as temperatures rise, but be cautious of any late frost.
April	With the last frost date of April 2, you can safely plant your frost-sensitive crops now, including tomatoes and peppers. Monitor night temperatures closely to protect new plantings.
May	In May, focus on maintaining your summer crops and ensuring they are well-watered. It’s also a good time to sow beans and squash directly in the garden.
June	June brings warmth, and your garden should be thriving. Continue to monitor for pests and weeds. Start planning for fall crops that can handle the summer heat.
July	In July, heat can become intense. Consider mulching around your plants to conserve moisture and keep soil temperatures steady. Harvest as vegetables mature.
August	With cooler mornings, August is the perfect month to start planting fall crops. Begin sowing kale and spinach well ahead of the October 28 frost.
September	In September, maintain your fall crops and prepare for the upcoming frost. This is the time to clear any dead plants and ready your garden for winter.
October	October signifies the end of the growing season with the first fall frost expected by October 28. Harvest all remaining crops and start winter preparations.
November	November is primarily about cleanup. Remove spent plants and add mulch to protect soil from frost. It’s also a great time to plan next year’s garden.
December	In December, your garden should be dormant. Use this time for winter reflections on what worked well and what you want to change for next year.

Frost dates for Tulsa ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
74133	April 2	October 28	7b
74105	April 2	October 28	7b
74110	April 2	October 28	7b

FAQ

When is the last frost in Tulsa?

The last frost in Tulsa typically occurs around April 2, making it the ideal date for gardeners to begin planting frost-sensitive crops.

What vegetables grow best in Tulsa?

Tomatoes, peppers, and corn excel in Tulsa's humid subtropical climate, thriving in the heat and producing abundant yields.

When should I plant tomatoes in Tulsa?

Tomatoes should be planted outdoors after the last frost date, which is April 2, ensuring they have a full growing season to produce.

Can I garden year-round in Tulsa?

While you can garden in Tulsa for most of the year, winter gardening is limited. Utilize the frost-free season for most crops, and plan for the cooler months.

How does Plan My Garden help Tulsa gardeners?

Plan My Garden offers tailored advice for Tulsa gardeners, providing ideal planting times and crop suggestions that suit the unique climate conditions of this region.