Planting calendar
July Planting Guide for Denver, CO: Raised Beds, Containers & In-Ground
In July, Denver gardeners can focus on heat-tolerant vegetables and herbs in raised beds, containers, or in-ground gardens. This month is ideal for planting warm-season crops and starting fall vegetables indoors to extend your harvest season.
Plant now (quick list)
Bush beans, Corn, Cucumbers, Summer squash, Tomatoes (transplants), Peppers, Basil, Melons
Plant now
- Bush beans
- Corn
- Cucumbers
- Summer squash
- Tomatoes (transplants)
- Peppers
- Basil
- Melons
- Okra
Start indoors
- Broccoli
- Cauliflower
- Cabbage
- Brussels sprouts
- Kale
- Lettuce
- Spinach
- Collards
Avoid
- Peas
- Potatoes
- Carrots (direct seeding late July can bolt)
- Cool-season crops outdoors
- Overwatering heat-sensitive seedlings
Next 2 weeks
- Mulch raised beds to retain moisture
- Water containers daily during heat waves
- Pinch back herbs to encourage bushy growth
- Monitor for pests like aphids and spider mites
- Begin hardening off fall crop seedlings
FAQs
Can I plant tomatoes directly in the ground in July in Denver?
Yes, transplant tomato seedlings into the ground or containers in July, but ensure consistent watering and mulch to protect roots from heat.
Is it too late to start lettuce outdoors in July?
Lettuce planted outdoors in July often bolts quickly due to heat; it's better to start lettuce indoors for a fall transplant.
How often should I water raised beds in July?
In Denver's dry summer, water raised beds deeply 2-3 times a week, increasing frequency during heat waves.
What are good herbs to grow in containers during July?
Basil, thyme, oregano, and chives thrive in containers during July with regular watering and some afternoon shade.
When should I start preparing for fall crops?
Begin starting fall crop seeds indoors in mid to late July to transplant outdoors in early September.
Next steps
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