Planting calendar
July Planting Guide for Denver, CO: Raised Beds, Containers & In-Ground
In July, Denver gardeners can focus on heat-tolerant crops and preparing for fall harvests. Plant warm-season vegetables and herbs now in raised beds, containers, or in-ground, while starting some fall crops indoors for transplanting later.
Plant now (quick list)
Bush beans, Cucumbers, Summer squash, Tomatoes (transplants), Peppers, Basil, Melons, Okra
Plant now
- Bush beans
- Cucumbers
- Summer squash
- Tomatoes (transplants)
- Peppers
- Basil
- Melons
- Okra
Start indoors
- Broccoli
- Cauliflower
- Cabbage
- Kale
- Brussels sprouts
- Lettuce
- Spinach
- Collard greens
Avoid
- Peas
- Potatoes
- Carrots (direct sowing late July can bolt)
- Cool-season crops outdoors
- Newly planted tender seedlings during heat spikes
Next 2 weeks
- Mulch to retain soil moisture
- Water deeply in early morning
- Watch for pests like aphids and spider mites
- Pinch back herbs to encourage bushier growth
- Thin seedlings to proper spacing
- Fertilize tomatoes and peppers
- Shade young transplants during hottest part of day
FAQs
Can I plant lettuce in July in Denver?
It's best to start lettuce indoors in July for transplanting in late summer, as direct sowing now risks bolting in the heat.
How often should I water raised beds in July?
Water deeply 2-3 times per week, adjusting for rainfall and heat; early morning watering reduces evaporation.
Are tomatoes safe to plant outdoors in July?
Yes, transplant healthy tomato seedlings now, but protect them from extreme heat and sun with shade cloth if needed.
What pests should I watch for in July?
Common pests include aphids, spider mites, and squash bugs; regular inspection and early intervention help control them.
Is it too late to start beans in July?
No, bush beans can be sown now for a late summer or early fall harvest in Denver's climate.
Next steps
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