Planting calendar
May Planting Guide for Phoenix, AZ: Raised Beds, Containers, and In-Ground Gardens
In May, Phoenix gardeners can focus on heat-tolerant vegetables and herbs for raised beds, containers, and in-ground planting. Plant warm-season crops now and prepare to start some heat-sensitive seeds indoors to extend your growing season. Avoid frost-sensitive plants that struggle in intense heat.
Plant now (quick list)
Okra, Sweet potatoes, Eggplant, Peppers, Melons, Cowpeas, Basil, Southern peas
Plant now
- Okra
- Sweet potatoes
- Eggplant
- Peppers
- Melons
- Cowpeas
- Basil
- Southern peas
- Sunflowers
- Tomatoes (transplants)
Start indoors
- Pumpkin
- Winter squash
- Cantaloupe
- Cucumbers
- Watermelon
- Zucchini
- Basil (for later transplant)
- Chili peppers
- Okra (for transplanting later)
- Eggplant (for transplanting later)
Avoid
- Lettuce (wilts in heat)
- Spinach
- Broccoli
- Cauliflower
- Peas
- Radishes
- Carrots (slow in heat)
- Potatoes
- Kale
- Brussels sprouts
Next 2 weeks
- Mulch raised beds to retain moisture
- Increase watering frequency for containers
- Monitor for heat stress on young plants
- Fertilize warm-season crops lightly
- Thin seedlings to prevent overcrowding
- Watch for pests like aphids and spider mites
- Provide shade during peak afternoon sun if needed
- Prepare soil for fall crops by adding compost
- Check irrigation systems for efficiency
- Harvest early-planted leafy greens before bolting
FAQs
Can I plant tomatoes directly in May in Phoenix?
Yes, transplant established tomato seedlings now as the soil is warm enough, but protect them from extreme afternoon heat initially.
How often should I water container plants in May?
Water containers daily or when the top inch of soil feels dry, as containers dry out faster in Phoenix's heat.
Is it too hot to start seeds outdoors in May?
Some heat-sensitive seeds may struggle outdoors; starting them indoors or in partial shade helps improve germination.
What are good heat-tolerant herbs to plant now?
Basil, oregano, and rosemary thrive in Phoenix's warm May conditions.
Should I use mulch in my raised beds during May?
Yes, mulch helps retain soil moisture and keeps roots cooler in the intense heat.
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