Replacing lawn with ground covers

Ground cover replacement of lawn is most successful when the site already disfavors grass -- heavy shade, slopes too steep to mow safely, compacted root zones under mature trees, or dry, rocky areas. In these situations, the ground cover wins by matching the conditions rather than fighting.

—- title: "Replacing lawn with ground covers" slug: lawn-replacement-with-groundcovers hub: lawn category: "Lawn guide" description: "How to replace lawn with ground covers: site assessment, species selection for sun vs. shade, establishment timing, and realistic transition timelines." date: 2026-06-10 updated: 2026-06-10 author: "Thomas A." reading_time: 8 —-

Ground cover replacement of lawn is most successful when the site already disfavors grass — heavy shade, slopes too steep to mow safely, compacted root zones under mature trees, or dry, rocky areas. In these situations, the ground cover wins by matching the conditions rather than fighting them.

Replacing healthy, well-performing lawn with ground covers for purely aesthetic or sustainability reasons is possible but requires significant establishment work and patience. Ground covers do not instantly colonize areas and many require 3—5 years to achieve the density needed to suppress weeds without ongoing intervention.

Matching ground cover to site

Per Cornell Cooperative Extension, site assessment is the first step. Key questions:

• Shade level: Deep shade (under conifers, north-facing walls) vs. dappled shade (deciduous canopy) vs. partial sun
• Moisture: Well-drained, average, or wet soil; regular rainfall or dry
• Traffic: None, occasional, or regular foot traffic
• Slope: Flat to gentle vs. steep
• Soil pH and drainage: Some ground covers are pH-sensitive

Shade ground covers

Pachysandra (Pachysandra terminalis): Per Penn State Extension, Japanese pachysandra is the most widely used shade ground cover in the Northeast. Tolerates dense shade and acidic soil (pH 5.0—6.5). Evergreen. No traffic tolerance. Spreads slowly; 3—4 years to dense coverage from 6-inch-spacing plugs. Susceptible to pachysandra leaf blight (Volutella pachysandrae) in poor air circulation.

Common periwinkle (Vinca minor): Tolerates dry to moderate shade. Evergreen; small blue flowers in spring. Per Cornell Cooperative Extension, it spreads more aggressively than pachysandra, achieving coverage in 2—3 years. Note: Vinca minor is considered invasive in some northeastern states; check your state's invasive species list before planting.

Liriope (Liriope spicata, L. muscari): Tolerates dense shade, dry soil, and moderate alkalinity. Purple flower spikes in summer. Per NC State TurfFiles, L. spicata spreads aggressively by underground stolons and is a good choice for large-scale coverage; L. muscari is clumping and spreads more slowly.

Pennsylvania sedge (Carex pensylvanica): Native; tolerates dry shade under oaks and conifers. Per Cornell Cooperative Extension, no other ground cover performs as well in dry, deep shade in the Northeast. Slow from seed; faster from plugs at 6-inch spacing.

Partial sun to full sun ground covers

Creeping thyme (Thymus serpyllum): Tolerates dry, rocky, low-fertility soil in full sun. Per Penn State Extension, one of the most drought-tolerant groundcovers for sunny replacement areas. Handles light foot traffic (occasional stepping). Pink to lavender flowers in summer are attractive to pollinators. pH tolerance: 5.5—7.5.

Sedum spp. (Sedum acre, S. spurium): Per Penn State Extension, low-growing sedums are excellent for dry, sunny slopes. Extremely drought-tolerant once established; virtually no fertility requirement; tolerates rocky and poor soil. Not traffic-tolerant.

Creeping phlox (Phlox subulata): Full sun to partial shade. Excellent spring color. Per Cornell Cooperative Extension, good for dry banks and slopes. Established plants require minimal water or fertilization.

Establishment

Killing the existing lawn

The existing grass must be fully killed before planting ground covers. Per NC State TurfFiles, glyphosate is the fastest method; solarization works for summer installation. Cardboard smothering works for shade situations where new light reaching the surface anyway is minimal.

Wait until killed vegetation is fully dead before planting (2 weeks after glyphosate application).

Planting spacing and density

Per Penn State Extension:

Closer spacing achieves faster coverage but increases material cost. Per Cornell Cooperative Extension, 6-inch spacing is the minimum for slope coverage where erosion control during establishment is a concern.

Mulching during establishment

Per NC State TurfFiles, apply 2—3 inches of shredded wood mulch between plants immediately after planting. This:

• Suppresses weed germination during the establishment period
• Retains soil moisture
• Does not restrict the plants from spreading — they grow over and through mulch

Replenish mulch in year 2 as it decomposes and coverage is not yet complete.

Weed management in years 1—3

This is the most demanding phase. Per Penn State Extension, hand weeding 3—5 times in the first growing season is typical. Once ground covers achieve full coverage and form a closed canopy, weed pressure drops substantially.

Frequently asked questions

How long before I can stop weeding? Per Cornell Cooperative Extension, most ground covers achieve closed canopy coverage in 2—4 years depending on species and spacing. After closure, spot weeding may be needed but the labor is a fraction of the establishment period.

Can ground covers replace lawn on slopes? Yes — slopes are actually the best application for many ground covers. Per NC State TurfFiles, deep-rooted species like liriope, creeping juniper, or established sedge hold slopes better than lawn grass and eliminate the mowing-on-a-slope safety concern.

Do ground covers need fertilizing? Most established ground covers need minimal fertilization. Per Penn State Extension, a light application of balanced fertilizer (0.5 lb N per 1,000 sq ft) in spring during the establishment period accelerates coverage. Established plants in natural-light conditions with organic mulch rarely need additional inputs.

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Sources

1. Penn State Extension — Ground Covers for Pennsylvania Landscapes
2. Cornell Cooperative Extension — Ground Cover Alternatives to Lawn
3. NC State TurfFiles — Lawn Replacement