A beautiful patio, a well-built retaining wall, a custom pergola — these are the structural bones of a great Maryland outdoor space. But hardscaping alone, without plants, can feel stark, unfinished, and disconnected from the surrounding landscape. The right plants — placed thoughtfully around and among hardscaping features — are what transform a well-built outdoor space into a complete, cohesive environment.

For Maryland homeowners, choosing plants to complement hardscaping requires attention to our specific climate. Maryland's summers are hot and humid, our winters are cold and wet, and our soils range from heavy clay to sandy loam depending on region. The best plants for Maryland hardscaping are those that thrive in these conditions without demanding excessive maintenance.

This guide covers the best plant choices for Maryland homeowners looking to complete their hardscaped outdoor spaces with softscape that looks intentional, performs reliably, and enhances the overall design.

Plants for Patio Perimeters and Borders

The planting immediately surrounding a patio sets the tone for the entire outdoor space. These plants should provide visual interest at eye level when seated, stay relatively compact to avoid overgrowing the patio edge, and perform consistently through Maryland's growing season.

Ornamental Grasses — Karl Foerster feather reed grass, little bluestem, and switchgrass are all excellent choices for Maryland patio borders. They provide movement, texture, and golden fall color, require minimal maintenance once established, and handle Maryland's clay soils and temperature extremes well. Their upright form creates natural separation between the patio and surrounding lawn without the maintenance demand of formal hedging.

Boxwood — A Maryland classic for structured patio borders. Low-growing boxwood varieties create formal, evergreen borders that frame a patio elegantly year-round. Choose disease-resistant varieties — boxwood blight is a concern in Maryland — and avoid planting in areas with poor air circulation.

Lavender — Thrives in Maryland's full sun areas adjacent to patios and hardscaping. Fragrant, pollinator-friendly, and drought-tolerant once established. The purple blooms against light stone or concrete pavers are a classic pairing.

Knockout Roses — One of the most reliable flowering shrubs for Maryland patio borders. Blooms repeatedly from spring through frost with minimal care requirements. Available in a range of colors.

Creeping Thyme and Ground Covers — Planted between paver joints or in the cracks of a natural stone patio, low-growing ground covers like creeping thyme, Irish moss, or creeping Jenny soften the hard edges of the hardscaping beautifully and release fragrance when stepped on.

Plants for Retaining Walls

Retaining walls present two planting opportunities: along the top of the wall, where plants cascade down over the face, and in front of the wall, where they soften its base and integrate it into the surrounding landscape.

Creeping Juniper — A reliable evergreen groundcover for Maryland that cascades beautifully over retaining wall faces. Extremely low maintenance, handles full sun and drought, and provides year-round green coverage.

Daylilies — One of the most dependable perennials in Maryland, particularly for the face of retaining walls and sloped areas. They spread to fill gaps, provide color through summer, and require virtually no care once established.

Catmint (Nepeta) — Lavender-blue flowers that bloom repeatedly through the Maryland growing season. Cascades gracefully over wall edges and attracts pollinators. Drought-tolerant and deer-resistant — a significant consideration in many Maryland areas.

Sedums — Succulent groundcovers that thrive in the hot, dry conditions often found at the top of retaining walls in full sun Maryland exposures. Extremely low maintenance with interesting texture and seasonal color.

Black-Eyed Susans — A Maryland native wildflower that naturalizes beautifully along retaining wall bases and slopes. Golden flowers through summer and fall, excellent for pollinators, tolerates Maryland's clay soil conditions.

Plants for Pergolas and Vertical Structures

A pergola without climbing plants is a structure waiting to be completed. The right climbing plants turn a pergola from an architectural element into a living canopy — providing shade, fragrance, seasonal interest, and beauty that improves every year.

Wisteria — The most dramatic pergola plant available for Maryland. Cascading purple blooms in late spring are spectacular. Wisteria grows vigorously and provides dense summer shade. It requires pruning to keep it from overwhelming the structure but rewards the effort magnificently.

Climbing Hydrangea — An excellent choice for shaded or partly shaded Maryland pergolas. White lacecap flowers in early summer, attractive peeling bark in winter, and reliable performance in conditions where many climbers struggle.

Trumpet Vine — A vigorous native Maryland climber with bright orange-red tubular flowers beloved by hummingbirds. Handles full sun, clay soil, and summer heat with ease. Aggressive grower — pair with a sturdy structure and plan for annual pruning.

Clematis — Hundreds of clematis varieties thrive in Maryland and are ideal for pergola columns and trellised panels. From small-flowered species types to large-flowered hybrids, there is a clematis for virtually every Maryland exposure and color preference.

Virginia Creeper — A Maryland native vine that covers pergola structures quickly, provides dense summer shade, and turns brilliant scarlet in fall. Extremely low maintenance and tolerant of most Maryland soil conditions.

Plants for Fire Pit and Seating Areas

Plants around fire pit areas need to be chosen carefully — proximity to heat and embers is a real consideration. Non-combustible hardscaping should always provide a clear buffer around the fire feature itself, with plantings positioned at a safe distance.

Ornamental Grasses at the Perimeter — Positioned several feet back from the fire pit, tall ornamental grasses create a natural enclosure for the seating area that provides privacy screening and visual interest without fire risk.

Agastache (Hyssop) — Fragrant, pollinator-attracting perennial that thrives in Maryland's summer heat. The aromatic foliage adds a pleasant sensory dimension to outdoor seating areas.

Russian Sage — Airy silver-blue foliage and lavender flowers that bloom through Maryland's summer heat. Extremely drought-tolerant once established and beautiful in the evening light when fire pit areas are most used.

Native Plants Worth Prioritizing in Maryland Hardscaping Designs

For Maryland homeowners who want plantings that support the local ecosystem and require the least intervention once established, native species deserve serious consideration. These plants evolved with Maryland's climate and soils — they do not require supplemental watering once established, support native pollinators and birds, and rarely need pesticide treatment.

Native options worth integrating into any Maryland hardscaping project include Eastern red columbine for shaded spots, Wild bergamot for sunny borders, Coneflower (Echinacea) for patio perimeters, Buttonbush for moist areas near drainage features, and River birch for vertical interest near retaining walls or pergola areas.

A Note on Planting Near Hardscaping in Maryland

Tree and shrub root systems can damage hardscaping over time — particularly pavers, retaining walls, and concrete surfaces. When selecting plants to place near hardscaping in Maryland, consider the eventual root spread of each species and position accordingly. Shallow-rooted groundcovers and ornamental grasses carry minimal risk. Trees planted within 10–15 feet of a patio or retaining wall should be species with non-invasive root systems.