At a Glance
| Attribute | Detail |
|---|---|
| USDA Zone | 6a |
| Annual Rainfall | 14 inches |
| Summer High | 90°F |
| Best Planting Season | Mid-April to early June, after last frost |
| Typical Upfront Cost | $9,000 / $20,000 / $45,000 |
| Annual Water Saving | $400–800 |
What No-Grass Actually Means in Denver
Denver Water offers xeriscape rebates of up to $2 per square foot for turf removal, plus free on-site consultations—incentives that reflect the reality of a city receiving just 14 inches of annual rainfall and facing perpetual drought restrictions. A typical 2,500-square-foot lawn consumes 40,000–60,000 gallons per season; replacing it with native grasses, perennial beds, and crushed decomposed granite saves $400–800 annually at Denver Water’s tiered billing rates. No-grass design here isn’t about bare dirt or artificial turf; it’s a strategic mix of low-water perennials, bunch grasses, and permeable hardscape that tolerates alkaline soil (pH 7.5–8.5), late spring frosts (May 3 average last frost), and hail. Many suburban HOAs now permit xeriscape conversions under updated covenants, but verify turf-replacement rules in writing before breaking ground. The upfront cost pays for itself in 11–22 years on water savings alone, faster if you factor in zero mowing, fertilizer, and aeration expenses. In Denver’s 300 sunny days and semi-arid climate, lawn-free landscapes out-perform turf on every metric: drought resilience, maintenance hours, and long-term water security.
Design Principles for No-Grass in Denver
1. Hydrozoning by Sun Exposure
Group plants by water need and microclimate. South-facing beds receive 8+ hours of direct sun and dry out fastest; place Penstemon strictus and blue grama there. North-facing areas retain morning moisture; site Aquilegia caerulea and wood ferns where they get afternoon shade. A single irrigation zone per plant group eliminates overwatering and runoff.
2. Alkaline-Adapted Plant Selection
Denver’s soil runs 7.5–8.5 pH. Skip acid-loving azaleas and blueberries; choose natives like rabbitbrush, apache plume, and threadleaf coreopsis that thrive in calcareous soils without sulfur amendments. Test your soil first; most failures trace to pH mismatch, not water.
3. Permeable Hardscape Over Poured Concrete
Rapid spring snowmelt and summer thunderstorms produce flash runoff. Use crushed decomposed granite, flagstone with wide joints, or permeable pavers to let water infiltrate. Solid concrete creates drainage headaches and violates stormwater codes in many Denver neighborhoods.
4. Three-Layer Canopy Structure
Mimic shortgrass prairie ecology: low sedges and Bouteloua gracilis as groundcover, mid-height bunch grasses like little bluestem at 18–30 inches, and accent shrubs (Rhus trilobata, Cercocarpus montanus) as anchors. Layering blocks wind, shades soil to slow evaporation, and creates year-round texture.
5. Hail-Resilient Plant Forms
Denver averages 8–12 hail events per season. Favor tough grasses, yuccas, and woody shrubs over brittle annuals or tender tropicals. Yucca glauca and threadleaf sage shrug off quarter-inch hail; delicate hostas shred on first impact.
What Looks No-Grass But Isn’t
Creeping Thyme as Lawn Substitute
Thymus serpyllum is marketed as a walk-on groundcover, but in Denver’s clay loam and low humidity it never forms a dense mat. Expect patchy growth, winter dieback, and weed infiltration by year two. Use it as a filler between stepping stones, not a primary surface.
Non-Native Ornamental Grasses with High Water Demands
‘Morning Light’ maiden grass (Miscanthus sinensis) and ‘Karl Foerster’ feather reed grass (Calamagrostis × acutiflora) appear xeriscape-friendly but require medium water—20–30 gallons per plant per week in July. True low-water choices are blue grama (Bouteloua gracilis), sideoats grama, and little bluestem, all adapted to 14-inch rainfall.
Artificial Turf
Synthetic grass qualifies for Denver Water rebates, but surface temperatures hit 160°F on 90°F days, making play areas unusable and radiating heat into adjacent beds. It also sheds microplastics and costs $8–12 per square foot installed—money better spent on living plants that cool the site and support pollinators.
Mulch-Only Beds
A 4-inch blanket of shredded bark over bare soil looks finished but bakes in full sun, compacts under hail, and offers zero habitat value. Mulch is a supplement to plants, not a replacement. Aim for 60–70% plant coverage; use mulch to fill gaps while perennials mature.
Clover Lawns
White clover (Trifolium repens) stays green with less water than Kentucky bluegrass, but it’s still a monoculture that requires irrigation, doesn’t tolerate foot traffic as claimed, and becomes a mud pit during snowmelt. If you want a continuous groundcover, choose a true low-water option like buffalo grass or accept that no-grass means varied textures, not a turf mimic.
Hardscape Choices That Reinforce the Constraint
Crushed Decomposed Granite (3/8-inch minus)
The workhorse of Denver xeriscape. Compacts to a firm walking surface, drains instantly, never needs watering, and costs $45–60 per cubic yard delivered. Install over landscape fabric to suppress weeds. Refresh edges every 2–3 years as material migrates. Avoid pea gravel; it shifts underfoot and doesn’t compact.
Flagstone with Wide Joints
Colorado buff or Pennsylvania bluestone set on a sand base with 2–4-inch gaps planted with blue grama or creeping sedum. Water infiltrates between stones; no runoff, no erosion. Expect $18–28 per square foot installed. Skip mortared joints—they crack under freeze-thaw cycles and funnel water where you don’t want it.
Permeable Concrete Pavers
Interlocking grid pavers (Belgard, Unilock) allow 80% water infiltration and meet Denver’s stormwater requirements. Cost runs $12–18 per square foot. They handle vehicle weight, unlike gravel, making them ideal for driveways and side yards. Choose light colors to reflect heat.
Boulders as Visual Anchors
Moss rock or Colorado red sandstone (18–36 inches) mimics Front Range geology and anchors plant groups. Place boulders first, then design beds around them. Budget $150–400 per boulder delivered. Avoid river rock; it reads decorative, not native, and offers no habitat crevices.
What to Avoid
Poured concrete cracks within five years under Denver’s freeze-thaw. Rubber mulch overheats and off-gasses. Treated lumber leaches chemicals into alkaline soil. Solid edging blocks water flow; use steel or aluminum edge restraint sunk flush with grade.
Cost and ROI in Denver
Tier 1: $9,000 (500–800 sq ft)
Front yard turf removal and replacement with decomposed granite pathways, three boulder groupings, and 40–60 perennials (penstemon, salvia, coreopsis, ornamental grasses). Includes 3 cubic yards of compost to amend clay, drip irrigation on a single zone, and 6 inches of shredded bark mulch. DIY planting saves $1,800–2,400 in labor. At $600 annual water savings, break-even in 15 years; factor in zero mowing costs and payback drops to 11 years.
Tier 2: $20,000 (1,200–1,800 sq ft)
Full front and side yard conversion. Flagstone steppers, raised planting beds with steel edging, two hydrozones (high-traffic areas on low water, accent beds on medium), 100–140 plants including three specimen shrubs (Cercocarpus montanus, Rhus trilobata), and landscape lighting. Professional design and installation. Denver Water rebate of $2 per square foot returns $2,400–3,600, lowering net cost to $16,400–17,600. At $700 annual savings, break-even in 23 years on water alone, 18 years when you count eliminated lawn inputs.
Tier 3: $45,000 (3,000+ sq ft)
Complete property transformation: permeable paver driveway, flagstone patios with integrated seating walls, mature tree installation (three 2-inch caliper piñon pines or serviceberries), custom steel arbor, outdoor lighting, and 200+ zone-verified plants across four hydrozones. Includes soil testing, landscape architect design, and one-year maintenance contract. Rebate potential $6,000+. This tier delivers a finished, publication-ready landscape with minimal learning curve. At $800 annual savings, break-even in 49 years—but resale value and quality-of-life gains justify the spend for move-in-ready buyers.
Try it on your yard
Seeing no-grass design rendered on your actual Denver property—with real sun angles, existing trees, and your soil conditions—turns abstract ideas into a concrete plan you can hand to a contractor or DIY with confidence.
See what no-grass landscaping looks like for your yard →
Plant Palette
| Plant | Zones | Sun | Water | Height | Why here |
|---|---|---|---|---|---|
| ‘Husker Red’ Penstemon (Penstemon digitalis) | 3–8 | Full | Low | 24–30” | Native to Great Plains; survives Denver’s alkaline soil and late frosts with zero supplemental water after year one. |
| Blue Grama (Bouteloua gracilis) | 3–9 | Full | Low | 12–18” | Colorado’s state grass; 6–8 inches annual rainfall native range; forms textured groundcover without mowing in Denver’s 14-inch climate. |
| ‘Blonde Ambition’ Blue Grama (Bouteloua gracilis) | 4–9 | Full | Low | 18–24” | Ornamental cultivar with horizontal seed heads; thrives in zone 6a alkaline soils and requires no irrigation after establishment. |
| Apache Plume (Fallugia paradoxa) | 5–9 | Full | Low | 36–48” | Woody shrub adapted to pH 7.5–8.5; pink feathery seed heads persist through Denver winters; hail-resistant form. |
| Rocky Mountain Penstemon (Penstemon strictus) | 4–8 | Full | Low | 18–24” | Front Range native; blue-purple spikes in June; tolerates Denver’s clay loam and survives on 14 inches annual rainfall. |
| Threadleaf Coreopsis (Coreopsis verticillata) | 3–9 | Full | Low | 18–24” | Fine texture complements bunch grasses; blooms July–September in Denver heat; no deadheading required. |
| ‘Moonshine’ Yarrow (Achillea ‘Moonshine’) | 3–8 | Full | Low | 18–24” | Flat yellow heads contrast with spiky grasses; alkaline-tolerant; zero water after first season in zone 6a. |
| Little Bluestem (Schizachyrium scoparium) | 3–9 | Full | Low | 24–36” | Native prairie grass; copper-orange fall color; self-sows in Denver’s sandy loam without becoming invasive. |
| Sideoats Grama (Bouteloua curtipendula) | 4–9 | Full | Low | 18–30” | Oat-like seed heads on one side of stem; adapted to 12–16 inches annual rainfall; no supplemental water needed in Denver. |
| ‘Walker’s Low’ Catmint (Nepeta ‘Walker’s Low’) | 3–8 | Full/Partial | Low | 18–24” | Lavender-blue flowers May–September; tolerates alkaline soil; deer-resistant; thrives on Denver’s 14 inches rainfall after year one. |
| Yucca (Yucca glauca) | 3–9 | Full | Low | 24–36” | Soapweed yucca native to Colorado; white bell flowers in June; survives hail, drought, and zone 6a winters without damage. |
| Three-Leaf Sumac (Rhus trilobata) | 4–8 | Full/Partial | Low | 36–60” | Native shrub; red fall color; fixes nitrogen in alkaline soils; forms dense thicket in no-grass Denver landscapes. |
| Autumn Joy Sedum (Hylotelephium ‘Autumn Joy’) | 3–9 | Full | Low | 18–24” | Succulent foliage; pink-to-rust flower heads August–October; requires zero water after establishment in zone 6a. |
| Chocolate Flower (Berlandiera lyrata) | 4–9 | Full | Low | 12–18” | Yellow daisies smell like cocoa in morning; native to alkaline soils; blooms June–September in Denver with no irrigation. |
| ‘May Night’ Salvia (Salvia nemorosa ‘May Night’) | 4–8 | Full | Low | 18–24” | Deep purple spikes; repeat bloomer; thrives in Denver’s alkaline soil and semi-arid climate; hummingbird magnet. |
Frequently Asked Questions
Does removing my lawn violate Denver HOA rules?
Many suburban HOAs updated covenants after 2012–2013 drought restrictions to permit xeriscape. Request your association’s landscape guidelines in writing; most now allow turf removal if you submit a design plan showing plant coverage, not bare dirt. Denver Water offers free pre-approval site visits that satisfy many HOA architectural review boards. If your HOA still requires turf, buffalo grass (Bouteloua dactyloides) is a low-water native that meets “lawn” definitions while using 75% less water than Kentucky bluegrass.
How do I deal with Denver’s alkaline soil in a no-grass design?
Test soil pH first; most Denver yards run 7.5–8.5. Rather than fighting it with sulfur amendments, choose plants adapted to calcareous soils: penstemon, yucca, apache plume, salvia, coreopsis, and native grasses. Amend clay texture with 3–4 inches of compost tilled to 8 inches deep to improve drainage, but don’t try to shift pH. Acid-loving plants (rhododendrons, blueberries, azaleas) will fail regardless of soil amendments; alkaline-adapted species thrive with zero input.
What’s the real water savings from removing 1,000 square feet of lawn?
A 1,000-square-foot Kentucky bluegrass lawn requires 18,000–25,000 gallons per season (May–September) in Denver’s 14-inch rainfall climate. Replacing it with low-water perennials and bunch grasses drops consumption to 3,000–5,000 gallons during establishment (year one), then near-zero after that. At Denver Water’s tiered summer rates ($4.15 per 1,000 gallons in Tier 2), you save $60–85 annually per 1,000 square feet removed. A typical 2,500-square-foot lawn replacement saves $150–210 per year on water alone, plus $180–240 in eliminated mowing, fertilizer, and aeration costs—total $330–450.
Can I get a rebate for artificial turf instead of plants?
Denver Water’s xeriscape rebate ($2 per square foot) does cover synthetic turf removal and replacement with low-water landscaping, but artificial grass itself qualifies only under the turf-replacement category, not as xeriscape. The rebate incentivizes living landscapes that reduce runoff and urban heat. Synthetic turf surfaces reach 160°F on 90°F days, require periodic infill replacement, shed microplastics, and cost $8–12 per square foot installed—more than a perennial-and-gravel design that cools your yard and supports pollinators. If you want a continuous green surface, buffalo grass uses a quarter the water of bluegrass and stays under 4 inches unmowed.
When should I plant a no-grass landscape in Denver to maximize survival?
Mid-April to early June, after the May 3 average last frost, gives perennials and grasses 10–12 weeks of root growth before summer heat. Fall planting (late August to mid-September) works for container-grown natives if you can water through October, but spring establishment is safer in zone 6a because plants enter winter with a full season of root development. Avoid planting July–August; 90°F days and low humidity stress new transplants even with daily watering. Mulch all beds with 3 inches of shredded bark immediately after planting to conserve soil moisture.
What happens to no-grass plants during a Denver hailstorm?
Denver averages 8–12 hail events per season, mostly May–August. Woody shrubs (apache plume, three-leaf sumac, mountain mahogany) and tough grasses (blue grama, little bluestem) suffer cosmetic damage but recover within 2–3 weeks. Yucca and sedum shrug off quarter-inch hail entirely. Avoid brittle annuals (petunias, impatiens) and tender perennials (hostas, astilbe) in exposed front yards. If a severe storm shreds foliage, cut damaged stems to 4–6 inches; most zone 6a perennials resprout from the crown by late June. Don’t replant immediately—wait to see what recovers naturally.
Do I need to amend Denver clay for a no-grass design?
Yes, but only for drainage, not pH. Till 3–4 inches of compost into the top 8 inches of clay to break up compaction and improve infiltration. This allows water to reach roots instead of running off. Skip peat moss (acidifies soil unnecessarily) and avoid sand alone (it binds with clay to form concrete). After amending, plant in fall or spring when soil is workable; summer-planted perennials struggle in unamended clay even with irrigation. Mulch beds with 3 inches of shredded bark to slow evaporation; replenish annually.
How do I transition from lawn to no-grass without creating a mud pit during the process?
Kill existing turf with a glyphosate application in late summer (August), then cover with 6–8 sheets of newspaper or cardboard and 4 inches of compost. Let it smother over winter. In April, till the decomposed layer, grade for drainage, and plant perennials and grasses. Install decomposed granite pathways and flagstone steppers first to define access routes and prevent soil compaction. If you need the yard functional immediately, rent a sod cutter ($90/day), strip turf, amend soil, and install plants and hardscape in one weekend. Mulch heavily to prevent erosion during spring snowmelt and summer thunderstorms.
Are there any no-grass plants that stay green year-round in Denver?
Zone 6a winters (lows to -10°F) limit true evergreen options. Yucca (Yucca glauca) holds gray-green foliage all year. Apache plume (Fallugia paradoxa) is semi-evergreen, retaining some leaves in mild winters. Most perennials (penstemon, coreopsis, salvia) go dormant November–March. For winter interest, choose ornamental grasses that hold tan-to-copper seed heads through snow: little bluestem, ‘Blonde Ambition’ blue grama, and sideoats grama. Pair them with red-twig dogwood (Cornus sericea) or three-leaf sumac for stem color. A successful Denver no-grass landscape embraces seasonal dormancy rather than forcing evergreen monoculture.
Can I use a no-grass design in a shaded Denver side yard?
Partial shade (4–6 hours sun) works for a handful of adaptable perennials like ‘Walker’s Low’ catmint, columbine (Aquilegia caerulea), and coral bells (Heuchera spp.), but true low-water, no-grass designs depend on full sun. Denver’s 300 sunny days and 14 inches of annual rainfall favor sun-adapted species; shade plants here typically need medium water to compensate for root competition from mature trees. If your side yard receives under 4 hours of sun, consider a mulched pathway with stepping stones and shade-tolerant groundcovers like creeping mahonia or kinnikinnick (Arctostaphylos uva-ursi), accepting that irrigation needs will be higher than a full-sun xeriscape. For more on working with Denver’s challenging side exposures, see our zone 6a side-yard strategies.
