When to Plant in Gilbert, AZ

In Gilbert, Arizona, the gardening year is framed by the last spring frost on February 14 and the first fall frost on November 29. With an impressive total of 288 frost-free days, gardeners have a substantial growing season to cultivate a wide variety of plants, from vibrant flowers to bountiful vegetables. This lengthy growing period allows for multiple harvests if planned accordingly.

Gilbert’s hot desert (Sonoran) microclimate encourages the growth of heat-loving crops such as tomatoes, peppers, and squashes, which thrive in the long, warm summers. However, plants like lettuce and other leafy greens may struggle due to the intense heat and potential for bolting, which occurs when they flower prematurely in high temperatures. Understanding these microclimatic nuances helps gardeners select the best crops for success.

What to plant now in Gilbert

Spring: Start seeds indoors for tomatoes and peppers around late January, then transplant them outside after the last frost date of February 14. This gives strong early growth before the summer heat.
Summer: Plant heat-tolerant crops like corn and beans directly in the garden after the risk of frost has passed, typically around early March, to take full advantage of the warm season.
Fall: Begin planting another round of vegetables like kale and radishes as the temperatures start to cool down. Aim for planting from early September leading up to the first frost date of November 29.
Winter: Use this time to prepare your garden beds and plan for spring planting. This is an excellent time to research and gather planting materials for the upcoming growing season.

In Gilbert (288 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.

Month by month in Gilbert

Month	What to do
January	Focus on starting seeds indoors for crops like tomatoes and peppers. Use grow lights if necessary, as natural sunlight may be limited during the winter months.
February	As the last frost date approaches on February 14, prepare to transition seedlings outdoors. Start hardening off plants, so they can adjust to the cooler temperatures before transplanting.
March	With the frost-free period beginning after February 14, it’s time to transplant your hardened-off seedlings outside. Direct sow beans and squash for summer harvests.
April	As temperatures rise, ensure consistent watering to sustain young plants. Continue planting heat-loving varieties like peppers and eggplants during this warm month.
May	This is the peak for summer planting. Check moisture levels continually in the garden and maintain mulch around plants to retain soil moisture under the increasing sun.
June	With the heat peaking, focus on irrigation techniques. Look for pest management strategies for common pests that thrive in the summer heat.
July	The relentless heat continues; be vigilant with watering and consider shade for delicate plants. Harvest any early summer crops and prepare for fall planting.
August	As temperatures start to cool slightly, plan your fall crop layout. Start seeds for colder-tolerant crops indoors, getting ready to plant by September.
September	Begin sowing seeds for fall crops like kale and radishes as the weather cools. Aim to plant mild-weather crops before the first frost on November 29.
October	Continue with fall planting and start to see the rewards from your summer crops. Prepare for the upcoming frost by mulching around sensitive young plants.
November	As the first fall frost approaches on November 29, focus on harvesting late fall crops. Protect perennials and prepare the garden for winter.
December	This month is mainly for planning and maintenance. Review your garden's performance from the past season and prepare for the spring planting cycle ahead.

Frost dates for Gilbert ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
85295	February 14	November 29	9b

FAQ

When is the last frost in Gilbert?

The last frost in Gilbert typically occurs on February 14, marking the time when gardeners can confidently start planting warm-season crops.

What vegetables grow best in Gilbert?

In Gilbert, vegetables such as tomatoes, peppers, and squash thrive due to the long, hot growing season of the Sonoran desert.

When should I plant tomatoes in Gilbert?

Tomatoes should be started indoors in late January and transplanted outdoors after February 14, ensuring they are well-established before the heat kicks in.

Can I garden year-round in Gilbert?

Yes, with 288 frost-free days, Gilbert allows for year-round gardening if crops are chosen seasonally and adapted to local conditions.

How does Plan My Garden help Gilbert gardeners?

Plan My Garden offers tailored advice, specific planting calendars, and local frost dates, helping Gilbert gardeners maximize their growing potential in a hot desert climate.