What to Plant in May: U.S. Zone-by-Zone Guide

May is one of the busiest planting months in the United States. What to plant in May depends on your USDA zone, local frost date, soil temperature, and regional climate.

In colder areas, gardeners may still plant cool-season vegetables. Warmer regions can move into tomatoes, peppers, beans, squash, and other summer crops. May is also a great time for herbs, flowers, and succession planting.

Quick Answer

In May, most U.S. gardeners can plant vegetables, herbs, flowers, and warm-season crops, but timing depends on local frost conditions. Wait until frost danger passes before planting tender crops outdoors.

TL;DR

• Check your local last frost date first.
• Plant cool-season crops in colder areas.
• Plant warm-season crops after frost.
• Warm soil helps summer crops establish.
• Start beans, corn, squash, and cucumbers outdoors.
• Plant tomatoes and peppers after suitable frost conditions.
• Add flowers and herbs for summer color and harvests.

1. Check Your Zone and Last Frost Date

May looks different across the United States. A gardener in Minnesota may still be watching frost while a gardener in Florida is already dealing with summer heat.

Your USDA hardiness zone helps describe winter conditions, but annual vegetables need more than a zone number. Check your local last frost date before planting tender crops.

The Old Farmer’s Almanac also bases planting calendars on local frost timing rather than using one nationwide date.

2. What to Plant in Zones 3–4

Cold zones may still have spring frost in May. Focus on hardy vegetables early in the month and warm-season crops after the danger of frost has passed.

Good choices include peas, carrots, lettuce, spinach, beets, potatoes, radishes, onions, and Swiss chard. You can also prepare warm-season seedlings for later planting.

Start warm crops indoors when your local schedule calls for them. Cucumbers, squash, melons, peppers, eggplant, and tomatoes need warmer conditions.

3. What to Plant in Zone 5

May is a major transition month in Zone 5. Once the last frost has passed, gardeners can move from cool-season crops toward summer vegetables.

Plant or transplant beans, corn, tomatoes, peppers, basil, cucumbers, squash, and sunflowers at the appropriate time. Zone 5 guidance also recommends watching for late frosts before putting tender transplants outside.

If nights remain cold, protect young plants instead of rushing them into exposed beds.

4. What to Plant in Zone 6

Zone 6 usually enters a strong planting period during May. Soil is warming, daylight is increasing, and many summer crops can move into the garden.

Consider tomatoes, peppers, beans, corn, cucumbers, zucchini, squash, basil, and sunflowers after suitable frost conditions. Cool-season crops such as peas and leafy greens may still be producing.

May is also a good time to succession-sow quick crops. This can spread harvests instead of producing everything at once.

5. What to Plant in Zone 7

Zone 7 gardeners can usually plant a broad mix of vegetables and flowers in May. The exact timing still depends on the local frost date and weather.

Good options include beans, cucumbers, squash, corn, tomatoes, peppers, basil, okra, pumpkins, and melons.

Keep young transplants well watered while they establish. Mulch can also help reduce moisture loss as temperatures rise.

6. What to Plant in Zones 8–10

Warm zones have a different May rhythm. Some cool-season vegetables may already be finishing, while heat-loving crops become more useful.

Depending on the local climate, consider okra, southern peas, sweet potatoes, peppers, eggplant, beans, and heat-tolerant herbs.

In some areas, May is also a maintenance month rather than a major planting month. Warm climates can become too hot for crops that prefer cool spring weather.

7. What to Plant in Zone 11

Zone 11 is frost-free, so frost timing is not the main concern. Instead, gardeners need to consider heat, rainfall, humidity, and the crop’s preferred growing season.

Heat-tolerant crops can be more suitable than traditional cool-season vegetables. Some temperate crops struggle during the hottest months.

Plan watering carefully and use mulch to reduce moisture loss. Choose varieties bred for your local climate whenever possible.

8. Best Vegetables to Plant in May

May offers one of the broadest vegetable planting windows of the year. The best choices depend on whether your garden is still cool or has entered warm-season weather.

Consider these options:

• Tomatoes after suitable frost conditions
• Peppers once nights are warm enough
• Beans by direct sowing
• Sweet corn in warm soil
• Cucumbers after cold weather passes
• Zucchini and summer squash in warm soil
• Carrots in suitable climates
• Beets where spring temperatures remain moderate
• Potatoes according to local planting timing
• Swiss chard for a flexible spring crop

9. Best Herbs to Plant in May

May is excellent for many culinary herbs. Warm weather supports basil and other herbs that dislike cold soil.

Good choices include:

• Basil
• Dill
• Cilantro
• Parsley
• Chives
• Oregano
• Thyme
• Sage
• Rosemary
• Summer savory

Cilantro can bolt quickly as temperatures rise. For a longer harvest, sow small amounts at intervals instead of planting everything on one date.

10. Flowers to Plant in May

May is also a strong month for summer flower gardens. Once frost danger passes, many annual flowers can move outdoors.

Popular choices include sunflowers, zinnias, cosmos, marigolds, nasturtiums, and other warm-season annuals.

Choose flowers based on sunlight and local temperatures. Most flowering annuals perform best with adequate sunlight and well-drained soil.

11. Direct-Sow These Crops in May

Direct sowing works well for crops that dislike root disturbance or grow quickly from seed. Soil should be suitable for the crop before sowing.

Good candidates include:

• Beans
• Corn
• Cucumbers
• Zucchini
• Summer squash
• Carrots
• Beets
• Radishes
• Sunflowers
• Zinnias
• Dill
• Cilantro

Follow the seed packet for planting depth and spacing. Crowded seedlings often need thinning after germination.

12. Transplant Tomatoes, Peppers, and Other Warm Crops

Warm-season transplants should not be rushed into cold soil. A sunny afternoon can feel warm while nighttime temperatures remain too low.

Before transplanting, make sure the local frost danger has passed and conditions suit the crop. Utah State University Extension recommends planting warm-season vegetables and annual flowers after the last-frost threat has passed.

Harden indoor-grown seedlings gradually before exposing them to full outdoor conditions.

13. Plant Containers and Raised Beds in May

Containers are useful when garden space is limited. They also give you more control over soil, drainage, and plant placement.

Good container choices include herbs, tomatoes, peppers, lettuce, flowers, and compact vegetables. Choose containers large enough for mature roots and provide drainage.

Raised beds can warm earlier than some ground soils. Avoid planting simply because the calendar says May; check actual soil and weather conditions first.

14. Common May Planting Mistakes

May encourages gardeners to plant quickly, but rushing can create problems.

• Planting tomatoes before frost danger has passed
• Putting peppers into cold soil
• Sowing heat-loving crops too early
• Ignoring local planting dates
• Crowding seedlings
• Forgetting to harden off indoor plants
• Overwatering newly planted seedlings
• Failing to support climbing crops
• Planting more vegetables than the garden can handle
• Forgetting succession planting

15. May Garden Care Checklist

Planting is only part of May gardening. Young plants also need regular attention as growth accelerates.

Use this checklist:

• Check plants for pests each week
• Mulch around established plants
• Water deeply when needed
• Thin crowded seedlings
• Install tomato supports early
• Add trellises for climbing crops
• Succession-sow quick vegetables
• Remove weeds while they are small
• Monitor soil moisture
• Harvest mature spring vegetables promptly

16. What to Plant Now vs. What to Wait For

The best May planting choice depends on your weather. Cool-season crops can still work in northern gardens, while warm-season vegetables become the main focus after frost in many central and southern areas.

If your soil remains cold, wait on tender crops. If frost danger has passed and the soil has warmed, May may be the perfect time for tomatoes, peppers, beans, corn, cucumbers, squash, and basil.

FAQs

What vegetables should I plant in May?

Common May choices include beans, corn, tomatoes, peppers, cucumbers, squash, carrots, beets, and potatoes. The best selection depends on your USDA zone and local frost date.

Is May too late to plant a vegetable garden?

No. May is one of the best planting months in many parts of the United States. Fast crops can still produce a harvest, while warm-season vegetables are just beginning their main growing period.

Can I plant tomatoes in May?

Yes, in many areas. Plant tomatoes outdoors after local frost danger has passed and conditions are suitable for warm-season growth.

What flowers can I plant in May?

Many gardeners can plant sunflowers, zinnias, cosmos, marigolds, and nasturtiums in May. Timing should still follow local frost conditions.

What herbs can I plant in May?

May is suitable for herbs such as basil, dill, parsley, cilantro, chives, oregano, thyme, and sage. Warm-weather herbs usually become easier to establish as soil temperatures rise.

Can I plant seeds directly in May?

Yes. Beans, corn, cucumbers, squash, carrots, beets, radishes, sunflowers, and several herbs can be direct-sown when soil conditions are appropriate.

Should I use my USDA zone or frost date?

Use both. Your USDA zone provides climate information, while your local frost date helps determine when tender annual crops can safely move outdoors.

Conclusion

Knowing what to plant in May starts with your local climate, frost date, and soil conditions. Cold regions may still focus on spring vegetables, while warmer areas can move fully into summer gardening.

Choose crops that match your conditions rather than planting everything at once. With good timing, regular watering, proper spacing, and simple May garden care, you can build a productive summer garden.