Early August is one of the most underrated times to plant in Colorado. While many gardeners are lamenting the end of tomato season or mourning crispy petunias, the savvy ones know they’ve stumbled onto something good. The soil is warm, the nights are starting to cool, and plants are quietly focused on one thing: growing roots. Less showing off, more getting ready for shorter days.
Plants installed now spend the next several months establishing deep root systems rather than struggling to produce flowers and foliage in blazing heat. By next spring, they’ll often outperform plants that went in during April. It’s one of those gardening secrets that rewards patience over enthusiasm.
Here’s what deserves a spot in your garden this month:
Perennials That Love an August Arrival
These perennial favorites settle in beautifully before winter:
- Coneflowers (Echinacea)
- Black-Eyed Susans
- Salvia
- Coreopsis
- Yarrow
- Sedum (‘Autumn Joy’ and similar varieties)
- Russian Sage
- Catmint
The key is consistent watering for the first several weeks while roots establish — think of it as helping new neighbors get settled before the cold moves in. Colorado State University Extension has excellent guidance on fall perennial planting for Front Range conditions.
Herbs That Appreciate Cooler Days
Many herbs actually perform better once August heat begins to fade. Good choices for late-season planting include:
- Parsley
- Chives
- Sage
- Oregano
- Thyme
- Mint (best kept in a container — mint has territorial ambitions and no sense of boundaries)
These herbs will build strong roots this fall and jump into production next spring. The National Gardening Association is a reliable resource for growing details on each variety.
Vegetables That Think Summer Is Overrated
August is practically the opening ceremony for cool-season vegetables. Plant now and you’ll be harvesting well into fall:
- Lettuce
- Spinach
- Kale
- Swiss Chard
- Beets
- Carrots
- Radishes
- Turnips
Many of these vegetables taste noticeably sweeter after a light frost — turns out a little cold is good for flavor. The Old Farmer’s Almanac Planting Calendar offers region-specific timing guidance worth bookmarking.
Shrubs That Will Thank You Next Spring
Early August is an excellent window for shrubs because warm soil encourages rapid root development before cold sets in. Worth considering:
- Hydrangeas
- Boxwoods
- Spirea
- Ninebark
- Potentilla
- Serviceberry
- Viburnum
The general rule: roots before snow, mulch before freeze, water until the ground hardens. Simple enough. The Arbor Day Foundation has straightforward planting guidance for each species.
Native Grasses That Will Thrive Year-Round
For Colorado yards specifically, native grasses planted in August establish exceptionally well — and they bring year-round structure and texture that flowering plants alone can’t provide. Colorado Native Grass is a helpful local resource for species selection and planting tips suited to Front Range conditions.
A Few August Planting Tips
Your new plants don’t ask for much:
- Water deeply two or three times each week rather than lightly every day
- Add 2–3 inches of mulch to keep soil temperatures even
- Skip high-nitrogen fertilizer late in the season
- Continue watering until the ground freezes if autumn turns dry
Come next April, while everyone else is sprinting to the nursery to grab whatever’s left, you’ll be walking through a garden full of plants that spent the winter quietly preparing for their debut. Gardening rewards the long view. August planters almost always have the most to show for it — and the most to brag about.
Planting Your Roots in Overland Ranch
The best time to plant roots — in your garden and in your life — is before everyone else figures out what they’re missing. At Overland Ranch, four exceptional builders — Century Communities, Pulte Homes, Richmond American, and Toll Brothers — are ready to help you find the right home and make it yours, from the first conversation to the final walkthrough. The first models open September 12; the rest October 3, with move-ins targeted for 2027. Join the interest list and get first access to everything as it blooms.
