Types Of Drought-Tolerant Groundcovers For New Jersey Landscaping

A well-chosen drought-tolerant groundcover reduces lawn area, cuts maintenance, improves soil stability on slopes, and provides seasonal color and habitat — all while using less water. New Jersey’s climate (primarily USDA zones 6a through 7b) supports a wide selection of resilient groundcovers for sunny, dry sites and for drier-shade situations under trees. This article catalogs reliable species and cultivars, explains siting and soil considerations, and gives practical planting and maintenance guidance so homeowners and landscape professionals can succeed with low-water groundcover plantings in New Jersey.

How to choose a drought-tolerant groundcover for New Jersey

Selecting the right groundcover starts with a clear match between the plant’s needs and the site conditions. Consider these factors first:

• Sun exposure: full sun, part shade, or full shade.
• Soil texture and drainage: sandy, loamy, clay, or rocky; is drainage free-draining or prone to puddles?
• Intended function: erosion control on slopes, weed suppression, lawn alternative, planting between pavers, or decorative flower displays.
• Maintenance tolerance: do you want near-zero care or seasonal trimming and division?
• Wildlife and pest pressures: deer resistance, pollinator value, and potential invasiveness.

Plant selection is not one-size-fits-all. A plant that thrives on a hot, sunny, sandy slope (for example, creeping thyme or juniper) will not perform well in heavy, poorly drained clay under a canopy of oaks (where carex or pachysandra alternatives perform better).

Site preparation and establishment: concrete steps for success

1. Test the soil pH and texture to decide if amendments are required. New Jersey soils vary; many sites benefit from organic matter, but succulents and junipers prefer very well-drained, lean soils and will suffer if soil is kept too rich or wet.
2. Remove weeds and turf mechanically or with a short round of solarization if large weeds are present. For large areas, lay landscape fabric or biodegradable weed-control blankets at installation if needed for quick weed suppression.
3. Amend the planting zone only if necessary. Add compost to depleted soils, but avoid over-fertilizing drought-tolerant succulents and native gravel-loving plants.
4. Install plants in spring or early fall. Early fall plantings give roots time to develop before winter and often require less supplemental water in late summer heat.
5. Water deeply and infrequently during the first 6-12 weeks to encourage deep root development. After establishment, most true drought-tolerant groundcovers need little to no supplemental irrigation except during prolonged droughts.

Sun-loving drought-tolerant groundcovers

These species are well-suited to full sun or strong afternoon sun on exposed slopes, rock gardens, and hot borders.

Creeping juniper (Juniperus horizontalis)

Creeping junipers are evergreen, woody groundcovers that tolerate heat, wind, poor soils, and low water. They establish quickly, form dense mats, and are excellent for erosion control on slopes and banks.

• Typical height: 6-24 inches.
• Spread: 3-12 feet, depending on cultivar.
• Soil: very well-drained; struggles in wet feet.
• Notes: Choose non-invasive cultivars such as ‘Blue Rug’ or ‘Bar Harbor’. Avoid overwatering and periodic pruning to maintain shape.

Sedum (stonecrop) species and cultivars

Low-growing sedums (Sedum spurium, Sedum album, Sedum reflexum) are succulent groundcovers that thrive in shallow, lean soils and rock gardens. They are exceptionally drought-tolerant and flower in summer.

• Typical height: 1-6 inches.
• Spread: 6-24 inches per patch; can be planted in drifts.
• Soil: excellent drainage; tolerates sandy soils and dry slopes.
• Notes: Plant in groups for best floral impact. Sedums can be used between pavers where foot traffic is light.

Creeping thyme (Thymus serpyllum and cultivars)

Creeping thyme forms fragrant mats of tiny leaves and produces profuse flowers that attract pollinators. It tolerates hot, dry, sunny sites and can handle light foot traffic.

• Typical height: 1-3 inches.
• Spread: 12-24 inches or more.
• Soil: lean, well-drained.
• Notes: Cultivars like ‘Elfin’ and ‘Purple Carpet’ offer flower color and differing leaf tones. Avoid heavy shade.

Creeping phlox (Phlox subulata)

Creeping phlox provides a spectacular spring floral carpet in full sun and tolerates dry, rocky soils once established.

• Typical height: 4-6 inches.
• Spread: 2-3 feet.
• Soil: well-drained; neutral to slightly alkaline is fine.
• Notes: Excellent for rock gardens, retaining walls, and slope plantings. Prune back lightly after flowering to maintain density.

Drought-tolerant groundcovers for dry shade and under trees

Shade and dry soils under mature trees are challenging because roots compete strongly and the soil can be compacted. Choose species adapted to shade and low moisture.

Pennsylvania sedge (Carex pensylvanica)

A native, fine-textured sedge that forms a soft, low-growing meadow-like carpet under trees. It tolerates seasonal drought and fits the native-plant aesthetic.

• Typical height: 6-12 inches.
• Spread: Forms loose clumps that interweave into a mat.
• Soil: adapts to dry, well-drained soils; prefers some organic matter.
• Notes: Low maintenance, mows poorly so use as a meadow groundcover or naturalized area.

Liriope (Liriope muscari and L. spicata)

Liriope performs well in shade and tolerates intermittent dry conditions once established. It is commonly used as a perennial groundcover or edging plant.

• Typical height: 8-18 inches.
• Spread: Forms clumps that can be divided to thicken coverage.
• Soil: well-drained, tolerates a range of soils.
• Notes: L. spicata can spread and become aggressive; select carefully and control via division.

Allegheny spurge (Pachysandra procumbens)

This native pachysandra is more drought-hardy than the common Japanese pachysandra and does well in dry shade with less pest pressure.

• Typical height: 8-12 inches.
• Spread: Slowly forming evergreen mats.
• Soil: humusy but not waterlogged.
• Notes: Use in garden beds under trees for a tidy, native alternative to non-native pachysandra.

Functional uses and species recommendations

• Erosion control on slopes: Creeping juniper, Sedum spurium, Phlox subulata, and native grasses like Carex pensylvanica.
• Between pavers and in paths: Sedum, thyme, and blue star creeper in low-traffic areas.
• Pollinator-friendly groundcover: Creeping thyme, sedum, phlox, and many low-growing veronicas.
• Low-maintenance evergreen cover: Creeping juniper, bearberry (Arctostaphylos uva-ursi), and select pachysandra alternatives.

Practical planting details: spacing, mulch, and irrigation tapering

• Spacing: For fast coverage, space plugs or small plants at 6-12 inches on center for mat-forming species (sedum, thyme), and 18-36 inches for slower woody species like juniper.
• Mulch: Use a light, coarse mulch during establishment to control weeds and retain soil moisture. For succulent groundcovers, avoid deep organic mulch that retains water; instead, use grit or gravel between plants if desired.
• Irrigation: Apply a deep soak at planting, then water only when the top 1-2 inches of soil are dry. After 1-2 seasons, most drought-tolerant species should survive on natural rainfall. Be prepared to irrigate during prolonged summer droughts in New Jersey, especially for newly planted material.

Maintenance: what to expect over the years

• Dividing and rejuvenating: Many groundcovers benefit from division every 2-4 years to maintain vigor (sedums, liriope, carex). Mark older patches and plan to lift, divide, and replant in fall or spring.
• Pruning: Trim back spent flowers on phlox and sedum to tidy appearance and encourage fresh foliage. Junipers may need occasional pruning to remove leggy growth.
• Weed control: Dense planting reduces weeds, but annual hand-weeding or a short-term mulch will speed establishment.
• Pest and disease: Proper site selection reduces problems. Root rot occurs where drainage is poor. Slugs and voles can damage low-growing foliage; monitor and take integrated pest measures when needed.

Native vs. non-native choices: trade-offs and benefits

Native groundcovers (Pennsylvania sedge, Allegheny spurge, bearberry) provide ecological benefits and often require less care once established. Non-native but well-adapted selections (creeping thyme, sedum, and some cultivars of phlox and juniper) offer ornamental traits and are widely available. Prioritize natives for larger naturalistic plantings and choose non-natives where specific color, texture, or functional needs demand them.

Common pitfalls and how to avoid them

• Planting drought-tolerant species in heavy, poorly drained soils. Avoid succulents and junipers in spots that remain wet in spring; amend with gravel or choose more moisture-tolerant species.
• Overwatering after establishment. Many failures occur because gardeners keep irrigating drought-tolerant plants as if they were moisture-loving perennials.
• Letting invasive groundcovers escape into wild areas. Monitor species like Vinca minor and Liriope spicata; control spread near natural areas.
• Ignoring deer browsing. Many low groundcovers are browsed by deer; choose deer-resistant species (juniper, sedum, thyme, bearberry) for high-deer areas.

Recommended plant palette for typical New Jersey situations

• Sunny, well-drained slope: Creeping juniper ‘Blue Rug’, Sedum spurium ‘Dragon’s Blood’, Thymus serpyllum ‘Elfin’.
• Sunny rock garden or between pavers: Sedum album, Sedum sexangulare, Thyme.
• Dry shade under oaks: Carex pensylvanica, Pachysandra procumbens, Liriope muscari (in moderate shade).
• Coastal or sandy site with salt exposure: Arctostaphylos uva-ursi (bearberry), seaside-adapted sedums and thyme cultivars.

Final takeaways

A successful drought-tolerant groundcover scheme in New Jersey depends on good site assessment, careful plant selection, and proper establishment practices. For long-term water savings and landscape resilience, favor species matched to sun exposure and soil drainage, prioritize natives where appropriate, and reduce supplemental irrigation once roots are established. With thoughtful spacing, judicious mulch, and periodic maintenance like division and spot weeding, groundcovers can deliver year-round structure, seasonal blooms, and robust erosion control while minimizing water use and upkeep.