May in Denver: The Growing Season Begins

In Denver, mid-May marks a turning point in the yard. The danger of frost has (mostly) passed, perennials are waking up, and it's finally safe to plant warm-season annuals and vegetables. For many homeowners, this is the moment when the yard goes from dormant to dynamic.

At Oak & Canyon, we think of mid-May as a kind of opening day for the growing season—a time to set the tone for a healthy, low-maintenance landscape all summer long.

Here’s what we’re seeing, and doing, in local yards this month:

1. Lawn Growth Is Kicking In
If your grass was a little patchy in April, don’t worry. May is when cool-season lawns start to grow in earnest. Regular mowing now encourages strong roots later. We’re mowing at a higher setting in early May to support moisture retention and avoid stressing out the grass.

2. Soil Is Ready for Planting
The soil has warmed, which means it’s safe to plant heat-loving favorites like basil, tomatoes, and zinnias. If you’re thinking of adding new native perennials, this is a great time to get them settled before the heat of June. We’re prepping beds with natural compost and organic mulch to give new plants the best possible start.

3. Mulch Matters More Than Ever
A 2–3 inch layer of mulch helps suppress weeds, retain moisture, and regulate soil temperature—especially important in our dry climate. It’s a small touch that makes a big difference. We use untreated, natural mulches that are safe for pets, people, and pollinators.

4. Small Fixes Now Prevent Big Problems Later
Now is the perfect time to check your irrigation system, tidy up garden beds, and fix bare lawn patches before they spread. A little effort in May goes a long way toward preventing headaches in July.

Need a hand? We’re here. Whether it’s planting, mowing, mulching, or helping your yard get back on track—we’re just a message away.

Let’s grow something great together.