Drought-Tolerant Groundcovers: Low-Water Plants That Replace Your Lawn

Why Replace Lawn with Groundcovers?

The traditional grass lawn is one of the most resource-intensive parts of any landscape. It needs constant mowing, regular watering, and frequent fertilizing. In many regions, lawn irrigation accounts for 30-60% of residential water use.

Drought-tolerant groundcovers offer a beautiful alternative. They:

• Save water — most need little to no irrigation once established
• Eliminate mowing — many stay under 6 inches naturally
• Reduce maintenance — no fertilizing, minimal weeding once filled in
• Support pollinators — many produce flowers that attract bees and butterflies
• Prevent erosion — dense root systems hold soil on slopes
• Look beautiful — textures, colors, and seasonal interest year-round

Quick Facts

What You'll Need

• Groundcover plants or plugs (buy in bulk for best value)
• Cardboard or landscape fabric to suppress existing grass
• 2-3 inches of mulch (gravel or bark)
• Garden trowel for planting
• Soaker hose for establishment watering (first season only)
• Soil amendments if needed (most groundcovers prefer lean soil)

Step-by-Step Guide

Step 1: Assess Your Site

Before choosing plants, understand your conditions:

• Sun exposure: Full sun (6+ hours), partial shade (3-6), or full shade?
• Soil type: Sandy, clay, loamy? Well-drained or wet?
• Foot traffic: Will people walk on it? Some groundcovers handle light traffic.
• Slope: Steep slopes need aggressive rooters to prevent erosion.
• Climate zone: Check your USDA Hardiness Zone for winter survival.

Step 2: Remove Existing Grass

The easiest method — sheet mulching (lasagna method):

1. Mow existing grass as short as possible
2. Layer cardboard over the entire area (overlap edges 6 inches)
3. Wet the cardboard thoroughly
4. Add 3-4 inches of compost on top
5. Wait 2-3 months (or over winter) for grass to die underneath

Faster option: Rent a sod cutter to remove grass mechanically, then amend soil.

Step 3: Choose Your Groundcovers

For Full Sun (6+ hours)

Creeping Thyme (Thymus serpyllum)

• Height: 2-4 inches
• Flowers: Pink/purple in summer, fragrant
• Walkable: Yes (releases scent when stepped on!)
• Zones: 4-9
• The most popular lawn replacement

Sedum (Stonecrop)

• Height: 2-6 inches depending on variety
• Flowers: Yellow, pink, or white
• Walkable: Light traffic only
• Zones: 3-9
• Extremely drought-tolerant, succulent leaves

Creeping Phlox (Phlox subulata)

• Height: 4-6 inches
• Flowers: Stunning spring carpet of pink, purple, white
• Walkable: No
• Zones: 3-9
• Incredible on slopes and rock walls

Ice Plant (Delosperma)

• Height: 2-4 inches
• Flowers: Brilliant neon colors
• Walkable: No
• Zones: 5-10
• Thrives in hot, dry, poor soil

For Partial Shade (3-6 hours)

Ajuga (Bugleweed)

• Height: 4-6 inches
• Flowers: Blue spikes in spring
• Walkable: Light traffic
• Zones: 3-9
• Deep purple foliage varieties available

Sweet Woodruff (Galium odoratum)

• Height: 6-8 inches
• Flowers: Tiny white stars in spring
• Walkable: Light traffic
• Zones: 4-8
• Lovely fragrance, spreads readily in shade

For Full Shade

Mondo Grass (Ophiopogon japonicus)

• Height: 6-12 inches
• Flowers: Small, inconspicuous
• Walkable: Yes (dwarf varieties)
• Zones: 6-10
• Evergreen, grass-like but needs no mowing

Step 4: Plan Your Spacing

Tip: Closer spacing = faster coverage but higher plant cost. Plant in a staggered grid pattern, not straight rows.

Step 5: Plant and Establish

1. Dig holes just large enough for each plant's root ball
2. Set plants at the same depth they were in their pots
3. Firm soil around roots
4. Water deeply after planting
5. Apply 2 inches of mulch between plants (gravel works great for drought-tolerant species)
6. Water regularly for the first growing season (1 inch per week)
7. After year one, reduce to natural rainfall only

Step 6: Maintain (Almost Nothing!)

Once established (after 1-2 seasons):

• Watering: None needed for most species (except during extreme drought)
• Mowing: Not needed — trim edges if desired
• Fertilizing: Not needed — most groundcovers prefer lean soil
• Weeding: Minimal once plants fill in and outcompete weeds
• Dividing: Every 3-5 years if plants get too thick (free new plants!)

Gravel Garden Option

The gravel garden is a trending 2026 approach combining groundcovers with decorative gravel:

1. Lay landscape fabric over prepared soil
2. Cut X-shaped slits for planting
3. Plant groundcovers through the slits
4. Cover fabric with 2-3 inches of decorative gravel
5. The result: a beautiful, zero-irrigation, zero-mowing landscape

Best plants for gravel gardens: Sedum, thyme, lavender, ornamental grasses, ice plant.

Common Problems and Solutions

Plants Not Spreading

Cause: Planted too deep, soil too rich, or not enough sun Fix: Ensure crown is at soil level, avoid fertilizing, check light requirements

Bare Patches

Cause: Uneven spacing or some plants didn't survive Fix: Fill gaps with divisions from healthy areas, or add new plants

Weeds Growing Through

Cause: Groundcover hasn't filled in yet Fix: Hand-weed carefully, add more mulch between plants. Patience — once filled in, groundcovers suppress weeds naturally

Frequently Asked Questions

How much water do I save compared to a lawn?

Established drought-tolerant groundcovers use 70-90% less water than traditional lawn grass. A 1,000 sq ft lawn replacement can save 20,000+ gallons per year.

Can I walk on groundcovers?

Some yes, some no. Walkable options: creeping thyme, dwarf mondo grass, ajuga (light traffic). Not walkable: creeping phlox, ice plant, sedum. For pathways, use stepping stones with groundcover between them.

How much does it cost to replace a lawn with groundcovers?

For a 500 sq ft area: approximately $200-600 for plants (depending on spacing and species), plus $50-100 for mulch/amendments. Compare to annual lawn care costs of $500-1000+ in water, fertilizer, and mowing.

Will groundcovers survive winter?

Yes — if you choose species rated for your USDA zone. Most options listed here are hardy to Zone 3-4 (temperatures to -30°F). They go dormant in winter and return in spring.

How long until my groundcover fills in completely?

Fast spreaders (thyme, ajuga): one growing season with close spacing. Moderate spreaders: 1-2 seasons. Plan for some bare mulch in year one — it fills in quickly.