Types Of Groundcovers To Replace Part Of Maryland Lawns

Replacing part of a traditional lawn with groundcovers can reduce maintenance, conserve water, increase biodiversity, and create attractive, functional areas in Maryland landscapes. Maryland spans USDA zones roughly 5b to 8a, with coastal influences, variable soils (sands on Eastern Shore, heavy clays inland), and a mix of sun and shade conditions. This guide describes practical, site-specific groundcover choices, how to install them, maintenance expectations, and design strategies to replace part of a Maryland lawn successfully.

Why replace lawn with groundcovers in Maryland?

Lawns require regular mowing, fertilization, irrigation, and pesticides. Replacing portions with the right groundcovers delivers these benefits:

Lower mowing and irrigation needs.
Improved habitat for pollinators and beneficial insects.
Better erosion control on slopes and in wet areas.
Reduced chemical inputs and nutrient runoff into Chesapeake Bay tributaries.
Visual interest and seasonal variety.

Groundcovers are not one-size-fits-all. Choose species based on sun exposure, soil texture and drainage, deer pressure, and desired appearance (evergreen vs seasonal, flowering vs foliage interest).

Key site factors to evaluate

Before selecting plants, assess these variables and take simple measurements:

Sun exposure: full sun (6+ hours), part sun/part shade (3-6 hours), or deep shade (less than 3 hours).
Soil drainage: well-drained, seasonally wet, or saturated. Do a simple percolation test (dig a hole, fill with water, measure how long it drains).
Soil pH and fertility: a basic soil test is inexpensive and informative for lime or fertilizer recommendations.
Deer pressure: observe local deer activity; many groundcovers are browse-prone.
Slope and erosion risk: steeper slopes benefit from rapid-spreading, root-holding groundcovers.

Proven groundcovers for Maryland: sun, part shade, and shade options

Below are reliable options grouped by typical site conditions. Each entry includes height, spread habit, soil and moisture preferences, deer resistance, and maintenance notes.

Full sun (hot, well-drained to average moisture)

Creeping thyme (Thymus serpyllum or T. praecox)
Height/spread: 1-3 inches tall, spreads 12-24 inches.
Soil/moisture: well-drained, tolerates poor soils and drought.
Deer resistance: generally resistant.
Maintenance: low; occasional light trimming after bloom keeps tidy. Good between stepping stones.
Sedum (Sedum spurium and other low sedums)
Height/spread: 2-6 inches, mats to 12-18 inches.
Soil/moisture: prefers well-drained soils; drought tolerant.
Deer resistance: moderate to good.
Maintenance: virtually none; tolerates poor soils and heat.
Creeping phlox (Phlox subulata)
Height/spread: 4-8 inches tall, spreads 12-24 inches.
Soil/moisture: well-drained, prefers slightly acidic soils.
Deer resistance: moderate; may be browsed in high pressure.
Maintenance: prune after flowering to maintain compact habit.

Part sun / light shade (3-6 hours sun)

Blue star creeper (Isotoma fluviatilis)
Height/spread: 1-3 inches, forms tight carpet.
Soil/moisture: likes consistent moisture but tolerates average soils.
Deer resistance: moderate.
Maintenance: tolerates light foot traffic; occasional thinning.
Ajuga (Ajuga reptans, aka bugleweed)
Height/spread: 3-6 inches; spreads by runners.
Soil/moisture: prefers average to moist soils, tolerates shade.
Deer resistance: variable; can be eaten.
Maintenance: can spread aggressively in ideal conditions; thin if it overtops other plants.
Microclover (Trifolium repens ‘micro’ or low-growing cultivars)
Height/spread: similar to turf height when used with grasses or alone.
Soil/moisture: adaptable, fixes nitrogen improving soil.
Deer resistance: moderate; sometimes grazed.
Maintenance: tolerates mowing; can be seeded into existing lawn or used as a lawn alternative.

Shade and deep shade (under trees, north-facing slopes)

Wild ginger (Asarum canadense) — native
Height/spread: 3-6 inches; spreads slowly by rhizomes and seed.
Soil/moisture: rich, moist, well-drained forest soils.
Deer resistance: good, often avoided.
Maintenance: very low; ideal for deep shade.
Foamflower (Tiarella cordifolia) — native
Height/spread: 6-12 inches, clumping spreads slowly.
Soil/moisture: moist, humus-rich soils.
Deer resistance: moderate.
Maintenance: divide clumps every few years to rejuvenate.
Epimedium (Epimedium spp.)
Height/spread: 6-12 inches; slow to moderate spread.
Soil/moisture: prefers dry to average, well-drained soils; great for dry shade.
Deer resistance: good.
Maintenance: minimal; cut back old foliage in early spring.

Wet sites and shorelines

Marsh marigold (Caltha palustris) — for seasonal wet spots
Height/spread: 6-18 inches; clumping.
Soil/moisture: tolerates saturated soils and seasonal floods.
Deer resistance: moderate.
Maintenance: periodic division; vibrant spring flowers.
Pennsylvania sedge (Carex pensylvanica) — native sedge for dry to mesic shade
Height/spread: 6-12 inches; forms a fine-textured sod.
Soil/moisture: tolerates dry, sandy soils and light shade.
Deer resistance: good.
Maintenance: low; excellent native lawn alternative in dry woodlands.

Native vs non-native considerations

Using native species supports local insects and birds. Many ornamental groundcovers (Vinca minor, Pachysandra terminalis, Ajuga) establish readily but can be invasive in naturalized settings and offer less value to native pollinators. Favor natives where proximity to natural areas, riparian zones, or wildlife corridors matters. In high-traffic or formal settings, some non-natives offer predictable performance–balance priorities.

Installation: step-by-step practical approach

Plan and delineate the replacement area. Determine percent of lawn to convert and map paths and access.
Test soil and correct pH or fertility if needed. Most Maryland yards benefit from lime only when soil test indicates.
Remove existing turf:
Mechanical: sod cutter or small tiller for small areas.
Smothering: sheet mulch with cardboard and 4-6 inches of mulch for 8-12 weeks is chemical-free and improves soil.
Chemical: herbicide (glyphosate) can be used where allowed; follow label and consider public perceptions.
Amend soil sparingly: add compost to improve structure, especially in heavy clay or washed-out sands. Avoid heavy topsoil layers that create drainage problems.
Planting methods:
Seeds: cost-effective for thyme, clover, sedge, and many natives. Seed in spring or early fall; expect slower visual results.
Plugs: 4-6 inch plugs for faster cover. Space plugs 6-12 inches apart depending on growth rate.
Potted or bare-root plants: immediate effect, more expensive.
Mats or rolls: pre-grown mats of thyme or sedum exist for instant coverage at high cost.
Mulch and water: initial watering is essential for establishment. Mulch around new plantings with 1 inch of leaf mulch or fine bark where appropriate; avoid smothering low mat-forming species.
Maintain for first season: weed frequently, water intentionally during dry spells, and monitor spread.

Design ideas and planting recipes

Low, fragrant pathway edge: Creeping thyme interplanted with sedum patches; plant pink or red-flowering thyme for seasonal color.
Shaded understory patch (under mature oaks): Wild ginger + foamflower + Pennsylvania sedge in a mixed matrix that tolerates dry shade.
Pollinator micro-meadow for sunny strips: blend native blue-eyed grass, low asters, and microclover for a soft, mowing-optional area.
Moist riparian bank: Marsh marigold + native sedges + Cardinal flower for seasonal blooms and erosion control.

Maintenance, longevity, and troubleshooting

Watering: most groundcovers need regular water for first 6-12 weeks. After established, drought tolerance varies; sedums and thyme need little, woodlanders need consistent moisture.
Pruning and control: many aggressive groundcovers will require periodic thinning. Keep aggressive spreaders out of natural areas.
Fertilization: minimal. Most benefit from an annual application of compost; avoid high-nitrogen lawn fertilizers.
Pests and disease: watch for crown rot in poorly drained spots and slugs in shady, moist areas. Choose tolerant species and improve air circulation.
Expectations: expect 6-18 months to reach full coverage depending on species and planting density.

Cost and scale considerations

Costs vary widely: seed mixtures or microclover may cost under $1.00 per square foot installed if DIY, while plug planting and professional installation for more ornamental groundcovers can range from $2 to $6+ per square foot. Pre-grown mats and specialized native plantings are at the higher end. Budget for initial site prep as it is often the largest time and cost factor.

Practical takeaways for Maryland homeowners

Match plant to micro-site: choose sun-loving species for southern exposures and woodland natives for shaded beds.
Use natives near streams and natural areas to support the Chesapeake Bay watershed and local fauna.
Replace contiguous patches of lawn (at least several hundred square feet) to get maintenance and ecological benefits; small islands help aesthetics but produce limited savings.
Establish groundcovers in spring or early fall and plan for 6-18 months of active management while plants mature.
Consider mixes: a mosaic of low sedums, thyme, and clover in sunny spots, and a mix of wild ginger, foamflower, and sedge in shade make resilient, visually layered plantings.
Check local rules: verify HOA and municipal ordinances for lawn requirements; many jurisdictions now allow or even incentivize native plantings and reduced-mow landscapes.

Replacing part of a Maryland lawn with thoughtfully chosen groundcovers is a practical strategy that reduces work, supports wildlife, and creates a resilient landscape. With appropriate site assessment, plant selection, and installation, you can transform turf into attractive, low-input groundcover areas that perform well across Maryland’s diverse conditions.