Best Drought-Tolerant Groundcovers for Lawn Replacement

The Shift Away from Traditional Turfgrass

For decades, the monoculture turfgrass lawn has been the default standard in American landscaping. However, as water scarcity becomes a pressing global issue and maintenance costs continue to rise, homeowners and landscape architects are increasingly turning to drought-tolerant groundcovers. These low-growing, spreading plants offer a lush, living carpet that mimics the visual appeal of a traditional lawn while requiring a fraction of the water, mowing, and chemical inputs.

According to the Environmental Protection Agency (EPA), the average American family uses 320 gallons of water per day, and nearly 30% of that is dedicated to outdoor uses. In arid and semi-arid regions, outdoor water use can account for up to 60% of a household's total water footprint. Replacing high-maintenance Kentucky Bluegrass or Tall Fescue with climate-adapted groundcovers is one of the most impactful, cost-effective landscaping decisions a homeowner can make.

Top Drought-Tolerant Groundcover Species

Selecting the right plant for the right microclimate is the cornerstone of sustainable landscaping. When choosing a species, you must consider sun exposure, soil drainage, and whether the area will experience foot traffic. Here are four exceptional groundcover species that thrive in low-water conditions.

1. Kurapia (Lippia nodiflora / Phyla nodiflora)

Kurapia is a highly versatile, broadleaf evergreen groundcover that has gained massive popularity in California and the Southwest. It features small, dense leaves and produces tiny white flowers that attract pollinators. Kurapia's deep root system can reach up to three feet into the soil, allowing it to survive extreme drought once established. It tolerates moderate foot traffic, making it an excellent direct replacement for recreational lawn areas. It thrives in full sun and requires only 1 to 2 deep waterings per month during peak summer.

2. Creeping Thyme (Thymus serpyllum)

For areas that receive moderate foot traffic and feature poor, rocky, or sandy soils, Creeping Thyme is a superstar. Growing only 2 to 4 inches tall, it forms a dense, fragrant mat that releases a pleasant herbal scent when stepped on. It produces vibrant pink or purple flowers in early summer. While highly drought-tolerant, it requires excellent drainage and will suffer in heavy, waterlogged clay soils. It is ideal for planting between stepping stones, along pathways, or in sunny rock gardens.

3. Creeping Rosemary (Salvia rosmarinus 'Prostratus')

If you need a groundcover for slopes, retaining walls, or areas where foot traffic is strictly prohibited, Creeping Rosemary is an outstanding choice. It cascades beautifully over hardscaping and provides year-round evergreen foliage. The plant is highly resistant to deer and rabbits, and its pale blue flowers provide early-season nectar for bees. It requires minimal water once established and thrives in hot, dry, Mediterranean-style climates. Space plants 3 to 4 feet apart, as they can spread up to 8 feet wide.

4. Stonecrop (Sedum spp.)

Succulents like Sedum spurium 'Dragon's Blood' or Sedum rupestre 'Angelina' are virtually indestructible in the face of drought. Stonecrops store water in their fleshy leaves, allowing them to survive months without rainfall. They are perfect for shallow soils, green roofs, and extreme heat zones. While they do not tolerate foot traffic, they provide brilliant seasonal color changes, turning deep reds or vibrant yellows in the fall and winter.

Species Comparison Chart

Use the following table to compare key characteristics of these groundcovers to determine which best fits your specific landscape needs.

Site Preparation: Removing the Old Lawn

Before planting your new groundcover, you must eliminate the existing turfgrass and weeds. Tilling is generally discouraged, as it brings dormant weed seeds to the surface and disrupts the soil microbiome. Instead, utilize a no-till method like sheet mulching or solarization.

• Sheet Mulching: Mow the existing grass as short as possible. Lay down overlapping layers of plain brown cardboard (removing all tape and staples). Wet the cardboard thoroughly, then cover it with 3 to 4 inches of organic compost or arborist wood chips. This process takes 2 to 3 months to fully kill the grass but leaves you with rich, workable soil.
• Solarization: Best performed during the hottest months of summer. Mow the lawn, water the soil deeply, and cover the area with a clear, UV-stabilized plastic tarp (2 to 4 mil thick). Bury the edges in a trench to trap the heat. The greenhouse effect will cook the grass and weed seeds in 4 to 6 weeks.

Planting Guidelines and Costs

Groundcovers are typically sold in flats of 50 to 72 'plugs' (small, 2-inch plants) or in 4-inch pots. Plugs are the most cost-effective option, generally ranging from $1.25 to $2.50 per plant, depending on the species and nursery.

Pro Landscaper Tip: To calculate how many plugs you need, measure your total square footage and divide by the square footage coverage of your chosen spacing. For example, spacing plugs 12 inches apart (1 foot) means one plug per square foot. For a 500 sq ft area, you will need 500 plugs.

When planting, dig holes just deep enough so the crown of the plant sits level with the surrounding soil. Backfill with native soil mixed with 10% compost. Avoid high-nitrogen synthetic fertilizers, which promote weak, thirsty growth. Apply a 1-inch layer of fine mulch (like shredded bark or compost) around the plugs to retain moisture and suppress weeds during the establishment phase. Do not use rock or gravel mulch for creeping thyme or kurapia, as these plants prefer to root into organic matter.

Establishment and Long-Term Maintenance

The Texas A&M AgriLife Extension Earth-Kind program emphasizes that even drought-tolerant plants require consistent moisture during their first 90 days to develop deep root systems. During the first month, water the plugs lightly every 2 to 3 days. In months two and three, transition to deeper, less frequent watering (e.g., twice a week) to encourage roots to chase the moisture downward.

By year two, your groundcover should be fully established. At this stage, you can reduce irrigation to once every two to three weeks during the summer, and rely entirely on rainfall during the winter and spring. Maintenance shifts from watering to occasional weed control and edging. Install physical landscape edging (such as steel or heavy-duty plastic bender board) around the perimeter of the groundcover to prevent it from invading adjacent garden beds or hardscapes.

Ecological Benefits of Groundcovers

Beyond water conservation and reduced maintenance, replacing turf with flowering groundcovers provides immense ecological benefits. Traditional lawns are essentially ecological dead zones, offering no food or shelter for local wildlife. In contrast, plants like Kurapia and Creeping Thyme produce nectar-rich blooms that support native bees, butterflies, and other vital pollinators.

The National Wildlife Federation highlights that incorporating diverse, native, or climate-adapted groundcovers is a critical step in restoring local habitats and creating certified wildlife-friendly gardens. Furthermore, the dense root mats of these plants prevent soil erosion, improve soil aeration, and sequester carbon, making your landscape not just beautiful, but actively beneficial to the environment.

Conclusion

Transitioning from a traditional turfgrass lawn to a drought-tolerant groundcover is a forward-thinking landscaping strategy that pays dividends in water savings, reduced maintenance, and ecological health. By carefully selecting species like Kurapia, Creeping Thyme, or Stonecrop that match your site's specific sun, soil, and traffic conditions, you can create a resilient, stunning landscape that thrives in harmony with your local climate.