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The Denver planting calendar 🌱 is your roadmap to a thriving garden in 2024, with exact dates tailored to Denver’s 5b/6a climate and 130-day frost-free window.
Here’s the catch: Planting too early risks frost damage, while waiting too long cuts your harvest short. Denver’s high altitude means even tomatoes and peppers need a head start, and cool-season crops like spinach and kale must go in by March.
This guide breaks down the month-by-month schedule for vegetables, flowers, and perennials—including when to start seeds indoors, transplant seedlings, and protect tender plants from late frosts.
Skip the guesswork and get the precise timing you need to maximize your yield, whether you’re growing potatoes in the cool spring or native wildflowers for summer color.
Denver planting calendar 2024: month-by-month schedule for vegetables, flowers & herbs
Denver’s 5,280-foot elevation and USDA Zone 5b/6a climate create a unique growing season where timing is everything.
With an average 130-day frost-free window (May 15–Oct 15), you’ll need to strategize carefully to maximize yields. Cool-season crops like spinach and kale thrive in early spring, while heat-lovers such as tomatoes and peppers demand precise transplant windows after frost danger passes.
This calendar maps out month-by-month planting, including direct-sowing dates for seeds and ideal transplant windows for seedlings. I’ve also highlighted Denver-specific adjustments, like using row covers to extend seasons or choosing fast-maturing varieties to beat early frosts.
Whether you’re a first-time gardener or a seasoned green thumb, these deadlines will help you avoid common pitfalls like overcrowding or planting too late.
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