Groundcovers do the unglamorous work of a landscape. They cover bare earth, slow erosion on slopes, lock moisture into the soil, and crowd out weeds that would otherwise take over a bed. Landscapers split the group into two camps: low-growing types that stay between 6 and 12 inches tall, and taller kinds in the 12- to 24-inch range. Sweet woodruff, lamb’s ear, and Japanese forest grass sit on the underrated end of the spectrum, yet each fills a specific niche better than many popular shrubs. Choosing well starts with understanding the categories, then matching the plant to the light, moisture, and traffic a spot receives. The payoff is even coverage that makes a yard look finished without a season of hand-weeding, the kind of result that defines colorful kitchens and other favorite spaces indoors.
Two Categories of Groundcover
Landscape designers point out that many homeowners only consider the shorter category to be a true groundcover. Expanding the definition to include the 12- to 24-inch range opens up far more possibilities that create the same lush expanse of foliage while also delivering weed prevention. Tall groundcovers read as a mass of texture rather than a flat carpet, which makes them useful for softening fences, covering utility areas, and filling the middle layer of a planting bed. Groundcovers also outwork bare mulch: a living carpet spreads on its own, does not wash away in heavy rain, and adds organic matter to the topsoil as leaves and stems cycle.
Plant selection runs on the same logic as tool selection. Landscapers reach for dependable performers the way contractors reach for the tools on the jobsite they trust, and the plant that shows up year after year with minimal fuss earns the permanent spot.
Low-Growing Groundcovers
Low growers stay between 6 and 12 inches tall. They work as living mulch under shrubs, along path edges, and between stepping stones. Sweet woodruff, lamb’s ear, creeping thyme, and clover mixes all fit the group, and each brings a different texture to the same job.
Where Low Growers Fit Best
Use low growers where foot traffic is light. They tolerate occasional stepping but not daily wear, so for paths that take real traffic, pair them with pavers or set them just off the walking line. Low growers also protect bare soil on gentle slopes where runoff would otherwise carry topsoil away.
| Groundcover | Height | Light | Moisture | Best use |
|---|---|---|---|---|
| Sweet woodruff | 6 to 10 inches | Shade to part shade | Moist, well drained | Under trees, shaded beds |
| Lamb’s ear | 10 to 14 inches | Full sun | Dry, well drained | Edges, rock gardens, borders |
| Japanese forest grass | 12 to 18 inches | Part shade to shade | Moist, rich | Mounds, slopes, container edges |
Sweet Woodruff: The Shade Specialist
Sweet woodruff (Galium odoratum) forms a soft green carpet of whorled leaves that reaches 6 to 10 inches tall. In spring it produces clusters of small white flowers, and the foliage carries a pleasant, haylike scent when dried, which is why it has a long history in potpourri. It spreads by creeping stems and roots, filling shaded beds where grass refuses to grow, particularly under trees where the soil stays moist.
Garden writers return to sweet woodruff season after season, and it regularly lands in the editors’ picks of shade-garden roundups for the same reason: it delivers even coverage with almost no input once it is established.
Planting Sweet Woodruff
Plant divisions or nursery pots in spring or fall, spacing them 8 to 12 inches apart. Water deeply for the first season so the roots knit together. The plant prefers moist, well-drained soil with organic matter, and it will tolerate dry shade once mature, though growth slows noticeably. Tuck spring bulbs like daffodils into the same bed; the foliage hides the dying bulb leaves as they yellow.
Managing Spread
Sweet woodruff spreads readily and can wander into lawn edges. Install a physical edge, mow a clean line twice a month, or pull runners that cross the boundary. Dividing the planting every two or three years keeps the center vigorous and gives you free plants for other beds.
Lamb’s Ear: Soft Foliage for Dry Spots
Lamb’s ear (Stachys byzantina) earns its name from the thick, silvery, woolly leaves that stay soft to the touch. It grows in rosettes 10 to 14 inches tall and sends up fuzzy flower spikes in summer that many gardeners cut off to keep the foliage mound tight. The plant is drought tolerant once established and thrives in full sun with sharp drainage.
Its needs are modest, and they follow the basics in any lawn care and gardening tips list from professional landscapers: right plant, right place, and restraint with water. Overwatering is the most common way to kill it.
Growing Conditions
Plant lamb’s ear in full sun with sandy or gritty soil, and amend heavy clay with compost or grit before planting. Space plants 12 to 18 inches apart; they knit into a soft silver carpet within two seasons. Cut back tattered leaves in early spring before new growth emerges. Deer tend to leave the fuzzy leaves alone, and the summer flower spikes attract bees.
Design Uses
The silver foliage pairs well with purple and blue flowers, ornamental grasses, and dark-leaved shrubs. It reads clearly at the front of a border, softens the edges of paths, and makes a tactile addition to children’s gardens. Wet shade is the one condition it will not tolerate.
Japanese Forest Grass: Ornamental Texture for Shade
Japanese forest grass (Hakonechloa macra) forms cascading mounds of arching blades that move in the lightest breeze. Green and gold-variegated varieties are common, and the foliage turns bronze or pink in fall depending on the cultivar. At 12 to 18 inches tall, it works as a tall groundcover, a specimen in a container, or a softening element along steps and paths.
Choosing a cultivar is a selection exercise like the one construction professionals use when they choose their favorite tools: weigh performance, durability, and fit for the specific job, then commit.
Light and Moisture Needs
Hakonechloa prefers part shade to shade and consistently moist, rich soil. Gold varieties tolerate more sun in cool climates but scorch in hot afternoon light. Mulch the root zone to hold moisture and protect the crown over winter. Pair it with hostas and ferns for a layered shade planting, and let the arching blades spill over path edges.
Establishment Time
This grass is slow to establish, and the first season can look sparse. Give it two to three years to reach full mound size, then divide clumps in early spring every few years to renew vigor and multiply plants for free.
Planting and Managing Groundcovers
Preparation decides success more than the plant choice. Clear existing weeds, work in compost, and level the bed before planting, and the groundcover will fill in on schedule. Follow a simple sequence:
- Clear the site of weeds and debris, then loosen the top 6 inches of soil.
- Amend with compost and rake the bed level.
- Space plants according to mature spread; closer spacing fills faster but costs more.
- Water deeply at planting and keep the bed moist for the first season.
- Mulch between young plants to suppress weeds while they knit together.
After establishment, the maintenance list shrinks to seasonal chores: water during droughts, divide every few years, and pull the occasional weed that slips through. Reliability is what makes a tool a favorite on any crew, and the same standard applies to groundcovers; choose proven species and the weekly to-do list nearly disappears.
Erosion Control on Slopes
On slopes, plant in staggered rows across the contour rather than in vertical strips. Staggered planting catches runoff at every level so water soaks in instead of racing downhill. Water slowly, and use a biodegradable erosion blanket until the plants root. Once established, most groundcovers need about an inch of water per week during dry spells, applied in one deep soaking rather than frequent light sprinkles.
Seasonal Maintenance Calendar
- Spring: cut back old foliage, divide crowded clumps, and top-dress with compost.
- Summer: water during dry spells and pull weeds before they set seed.
- Fall: rake leaves off the mats and skip heavy fertilizer that pushes soft growth.
- Winter: leave evergreen foliage in place; it protects crowns from frost.
The three underrated groundcovers cover the common gaps: shade under trees, dry sunny edges, and ornamental texture where a flat carpet feels dull. Each asks for a different site, and each rewards the right match with years of low-effort coverage. The finished result is the kind of landscape that becomes a reader favorite, the planting neighbors photograph and ask about, in the same way a timber home earns loyal fans for its warmth and character.