Native Plant Gardening: Why Local Species Need Less Water and Maintenance
A typical suburban landscape of turf grass, hybrid roses, and non-native ornamental shrubs consumes 30,000 to 50,000 gallons of water per year, requires 4 to 6 applications of synthetic fertilizer, and demands 40 to 60 hours of maintenance labor (mowing, pruning, spraying, weeding). The same landscape replanted with native species consumes 5,000 to 15,000 gallons of water per year, requires zero fertilizer after the first growing season, and demands 15 to 25 hours of maintenance labor. The reason is adaptation. Native plants evolved over thousands of years in the specific soil types, rainfall patterns, temperature extremes, and pest populations of their region. They do not need coddling because they are already adapted to the conditions that kill non-native plants. This guide explains how to select, plant, and maintain native species in a home garden, with specific plant recommendations for four major North American regions.
The Biology Behind Native Plant Resilience
Native plants outperform non-natives in home landscapes for three biological reasons: root depth, soil adaptation, and co-evolution with local insects.
Root Systems
Native prairie grasses and wildflowers develop root systems 6 to 15 feet deep, compared to turf grass (2 to 4 inches) and most ornamental perennials (12 to 18 inches). Little bluestem (Schizachyrium scoparium), a native prairie grass, sends roots 7 feet deep. Prairie dock (Silphium terebinthinaceum) reaches 14 feet. These deep roots access water and minerals unavailable to shallow-rooted plants, which is why native prairie plants survive drought conditions that kill Kentucky bluegrass within 2 weeks. A single acre of established native prairie absorbs 9 inches of rainfall per hour before runoff occurs, compared to 1 to 2 inches for turf grass. In a home garden, this means native plantings reduce stormwater runoff from your property by 60 to 80 percent.
Soil Adaptation
Plants native to the eastern deciduous forest region (zones 5 to 7) evolved in soils with pH 5.5 to 6.5, high organic matter (3 to 6 percent), and adequate rainfall (36 to 48 inches per year). Plants native to the western prairie (zones 4 to 6) evolved in alkaline soils (pH 6.5 to 8.0), low organic matter (1 to 3 percent), and lower rainfall (20 to 35 inches per year). Planting a western prairie native in eastern clay soil, or an eastern woodland native in western sandy soil, produces disappointing results. The key to success with native plants is matching species to your specific soil conditions, not just your hardiness zone.
Co-Evolution with Insects
Research by Dr. Doug Tallamy at the University of Delaware has demonstrated that native plants support 15 to 35 times more caterpillar species than non-native ornamentals. Caterpillars are the primary food source for nesting birds: a single pair of chickadees requires 6,000 to 9,000 caterpillars to raise one brood of chicks. Native oak trees (Quercus spp.) support 534 species of caterpillars. Non-native ginkgo trees (Ginkgo biloba) support 0 species. Native black-eyed Susan (Rudbeckia hirta) supports 20 species. Non-native Japanese barberry (Berberis thunbergii) supports 1 species. A garden planted with native species functions as a food web, supporting pollinators, birds, and beneficial insects. A garden planted with non-native species is ecologically sterile by comparison.
Native Plants for the Northeast (Zones 4 to 7)
The Northeast region spans from Maine to Pennsylvania and west to Ohio. Soils range from acidic sandy loam in New England to alkaline clay in western Pennsylvania. Rainfall is adequate (35 to 50 inches per year) and evenly distributed throughout the year.
Flowering Perennials
Purple coneflower (Echinacea purpurea): 3 to 4 feet tall, purple-pink daisy-like flowers July to September. Full sun, well-drained soil, pH 6.0 to 7.0. Drought-tolerant once established. Supports 12 species of butterflies and native bees. Deadhead spent flowers to extend bloom by 3 to 4 weeks. Black-eyed Susan (Rudbeckia hirta): 2 to 3 feet tall, golden-yellow flowers with dark centers, June to October. Full sun, tolerates poor soil. Biennial or short-lived perennial; self-seeds reliably. New England aster (Symphyotrichum novae-angliae): 3 to 6 feet tall, purple flowers August to October. Full sun to partial shade. Pinch stems back by half on June 15 to reduce height and increase branching. The single most important late-season nectar source for migrating monarch butterflies. Wild bergamot (Monarda fistulosa): 2 to 4 feet tall, lavender-pink flowers July to September. Full sun. Spreads by rhizomes to form colonies 3 to 4 feet wide. Attracts hummingbirds, bumblebees, and sphinx moths. Susceptible to powdery mildew in humid locations; plant in areas with good air circulation.
Native Grasses
Little bluestem (Schizachyrium scoparium): 2 to 4 feet tall, blue-green foliage turning copper-red in fall. Full sun, drought-tolerant. The most widely adapted native grass for home landscapes. Provides winter interest and bird habitat. Switchgrass (Panicum virgatum): 4 to 6 feet tall, airy seed heads in August. Full sun, tolerates wet and dry soils. Cultivars: Northwind (upright, 5 feet, blue-green), Shenandoah (red fall color, 4 feet), Heavy Metal (steel-blue foliage, 4 feet). Indian grass (Sorghastrum nutans): 4 to 6 feet tall, golden plumes in late summer. Full sun. Pair with little bluestem and switchgrass for a native grass border that requires zero irrigation after establishment.
Shrubs
Ninebark (Physocarpus opulifolius): 5 to 8 feet, arching branches with white flower clusters in May to June. Full sun to partial shade. Cultivars: Diablo (purple foliage), Summer Wine (compact, burgundy), Little Devil (3 to 4 feet, dwarf). Winterberry holly (Ilex verticillata): 6 to 10 feet, red berries persist from October through February. Requires male and female plants for berry production (plant 1 male per 5 females). Tolerates wet soil. The berries are a critical winter food source for 48 species of birds. Serviceberry (Amelanchier laevis): 15 to 25 feet (can be pruned as a multi-stemmed shrub), white flowers in April, edible purple berries in June, orange-red fall color. Tolerates full sun to partial shade. Edible berries resemble blueberries in flavor and are high in antioxidants.
Native Plants for the Southeast (Zones 7 to 9)
The Southeast region spans from Virginia to Florida and west to Texas. Soils are predominantly acidic (pH 4.5 to 6.0) with high organic matter in forested areas and low organic matter in coastal plains. Summer heat and humidity are intense, and drought is common from June through September.
Flowering Perennials
Butterfly weed (Asclepias tuberosa): 1 to 2 feet tall, orange flowers June to August. Full sun, well-drained soil. The host plant for monarch butterfly caterpillars. Drought-tolerant; dies in wet soil. Joe Pye weed (Eutrochium purpureum): 4 to 7 feet tall, dusty pink flower clusters July to September. Full sun to partial shade, tolerates wet soil. A magnet for butterflies and native bees. Cultivar Gateway is more compact at 4 to 5 feet. Cardinal flower (Lobelia cardinalis): 2 to 4 feet tall, brilliant red flowers July to September. Partial shade, moist to wet soil. The single best native plant for attracting hummingbirds. Short-lived perennial (2 to 3 years) but self-seeds in moist conditions. Blue flag iris (Iris versicolor): 2 to 3 feet tall, blue-violet flowers May to July. Full sun to partial shade, thrives in wet soil at pond edges or rain gardens.
Native Grasses
Muhly grass (Muhlenbergia capillaris): 2 to 3 feet tall, pink cloud-like seed heads in September and October. Full sun, drought-tolerant. The most ornamental native grass for Southeastern landscapes. Indiangrass (Sorghastrum nutans): 4 to 6 feet tall, golden plumes. Full sun, tolerates clay soil. Eastern gamagrass (Tripsacum dactyloides): 4 to 6 feet tall, a warm-season native grass related to corn. Full sun, tolerates wet soil.
Shrubs
Florida flame azalea (Rhododendron austrinum): 6 to 10 feet, orange-yellow flowers in March to April. Partial shade, acidic soil. Sweet pepperbush (Clethra alnifolia): 3 to 8 feet, white fragrant flowers in July to August. Partial shade, tolerates wet soil. Cultivar Ruby Spice has deep pink flowers. American beautyberry (Callicarpa americana): 4 to 8 feet, clusters of bright purple berries along the stems in September to November. Full sun to partial shade. The berries persist for 4 to 6 weeks and are eaten by songbirds. Wax myrtle (Morella cerifera): 10 to 15 feet, semi-evergreen, aromatic foliage. Full sun to partial shade, salt-tolerant, fast-growing (3 to 5 feet per year). Provides dense cover for birds and screening for privacy.
Native Plants for the Midwest (Zones 4 to 6)
The Midwest region spans from Minnesota to Missouri and east to Indiana. Soils are predominantly fertile loam (pH 6.0 to 7.5) developed under tallgrass prairie. Rainfall is moderate (30 to 40 inches per year) with a summer maximum. Winter temperatures reach -20 to -30 degrees Fahrenheit in the northern portions.
Flowering Perennials
Prairie blazing star (Liatris pycnostachya): 3 to 5 feet tall, purple flower spikes July to September. Full sun, well-drained soil. a highly spectacular native wildflowers. Attracts monarch butterflies and native bees in large numbers. Pale purple coneflower (Echinacea pallida): 2 to 3 feet tall, pale pink petals drooping from a central cone, June to July. Full sun, drought-tolerant. More graceful than the common purple coneflower. Wild quinine (Parthenium integrifolium): 2 to 4 feet tall, clusters of small white flowers June to August. Full sun, drought-tolerant. The flowers persist for 4 to 6 weeks as dried arrangements. Blue false indigo (Baptisia australis): 3 to 4 feet tall, blue pea-like flowers in May to June. Full sun, drought-tolerant, deep taproot (makes transplanting difficult; plant from containers). Foliage resembles a shrub and provides structure in the border.
Native Grasses
Big bluestem (Andropogon gerardii): 4 to 7 feet tall, turkey-foot-shaped seed heads in August. The dominant grass of the tallgrass prairie. Full sun, deep roots (up to 10 feet). Cultivar Red October has red fall color. Sideoats grama (Bouteloua curtipendula): 1 to 2 feet tall, oat-like seeds along one side of the stem. Full sun, extremely drought-tolerant. The state grass of Texas but native throughout the Midwest. Prairie dropseed (Sporobolus heterolepis): 2 to 3 feet tall, airy panicles in August. Full sun. The most refined native grass, with a fine texture and a distinct popcorn-like fragrance when in bloom.
Shrubs
American hazelnut (Corylus americana): 6 to 12 feet, edible nuts in September to October. Full sun to partial shade. Suckers to form thickets that provide bird habitat. Red-osier dogwood (Cornus sericea): 6 to 10 feet, brilliant red stems in winter. Full sun to partial shade, tolerates wet soil. Best stem color on young growth; cut to the ground every 3 years to renew. Lead plant (Amorpha canescens): 2 to 3 feet, purple flower spikes with orange anthers in June to July. Full sun, extremely drought-tolerant. A nitrogen-fixing legume that improves soil fertility.
Native Plants for the West (Zones 5 to 9)
The Western region spans from the Pacific coast to the Rocky Mountains. Conditions vary dramatically from the wet coastal climate of the Pacific Northwest (40 to 60 inches of rain per year) to the arid interior (8 to 15 inches per year). Soil pH ranges from acidic (5.0 to 6.0) in the Pacific Northwest to highly alkaline (7.5 to 8.5) in the Rocky Mountain and desert regions.
Flowering Perennials (Arid West)
Penstemon (Penstemon spp.): 1 to 3 feet tall, tubular flowers in shades of blue, purple, pink, and red, May to July. Full sun, extremely drought-tolerant. Over 250 native species; choose local ecotypes. Rocky Mountain penstemon (P. strictus, blue), Firecracker penstemon (P. eatonii, red), and Palmer's penstemon (P. palmeri, pink) are widely adapted. Indian paintbrush (Castilleja spp.): 8 to 18 inches, brilliant red-orange bracts April to July. Full sun. Semi-parasitic; requires a host plant (native grass) to grow successfully. Difficult to transplant; sow seed directly where you want it to grow. Blanket flower (Gaillardia aristata): 1 to 2 feet tall, red and yellow daisy-like flowers June to September. Full sun, drought-tolerant, tolerates poor soil. Long bloom period. Blue flax (Linum lewisii): 1 to 2 feet tall, sky-blue flowers May to July. Full sun, short-lived perennial (2 to 3 years) but self-seeds reliably.
Flowering Perennials (Pacific Northwest)
Pacific bleeding heart (Dicentra formosa): 12 to 18 inches, pink heart-shaped flowers April to June. Partial to full shade, moist soil. Spreads by rhizomes to form a ground cover. Western columbine (Aquilegia formosa): 1 to 3 feet, red and yellow spurred flowers May to August. Partial shade. Attracts hummingbirds. Oregon grape (Mahonia aquifolium): 3 to 6 feet, yellow flower clusters in March to April, blue-purple berries in summer. Partial shade to full shade, evergreen. The state flower of Oregon.
Native Grasses (Arid West)
Blue grama (Bouteloua gracilis): 12 to 18 inches, eyelash-like seed heads July to August. Full sun, extremely drought-tolerant (survives on 8 to 12 inches of annual rainfall). Can be used as a turf replacement, mowed at 3 inches or left unmowed. Buffalo grass (Bouteloua dactyloides): 4 to 8 inches, a native turf grass that requires 75 percent less water than Kentucky bluegrass. Full sun. Establish from sod or plugs (seed germination is slow and inconsistent). Requires 1 to 2 inches of water per month once established.
Site Preparation and Planting
Native plants are not maintenance-free. They require careful site preparation and consistent care during the first growing season while their root systems establish. After the first year, maintenance drops dramatically.
Soil Preparation
Native plants do not require the amended, fertilized soil that ornamentals demand. In fact, adding compost or fertilizer to a native planting can harm drought-adapted species by encouraging lush, soft growth that is susceptible to disease and drought stress. For prairie and meadow plantings, remove existing vegetation (turf grass, weeds) by smothering with 6 to 8 sheets of newspaper covered with 4 inches of mulch for 60 to 90 days, or by spraying with glyphosate (if you are not strictly organic) and waiting 7 to 10 days before planting. For woodland plantings, remove invasive species (garlic mustard, Japanese stiltgrass, bush honeysuckle) by hand-pulling or targeted herbicide application. Do not till the soil. Tilling brings dormant weed seeds to the surface and destroys the soil structure that native plants depend on.
Planting Technique
Plant container-grown native perennials in spring (April to May) or fall (September to October). Spring planting allows roots to establish before summer heat. Fall planting takes advantage of warm soil and cool air, which promotes root growth without top-growth stress. Dig each hole 2 to 3 times wider than the container but no deeper. Set the plant at the same level it grew in the container. Backfill with the native soil removed from the hole. Do not add compost, fertilizer, or soil amendments. Water thoroughly after planting (1 to 2 gallons per plant) and apply 2 to 3 inches of shredded bark mulch, keeping the mulch 2 inches away from the plant stem to prevent rot. Space plants according to their mature width: 12 to 18 inches for small perennials (1 to 2 feet wide), 24 to 36 inches for large perennials and grasses (3 to 5 feet wide). Closer spacing fills in faster but requires division after 3 to 4 years.
First-Year Care
Water newly planted natives every 2 to 3 days for the first 2 weeks, then once per week for the remainder of the first growing season. After the first year, native plants in regions with 30 or more inches of annual rainfall require no supplemental irrigation. In arid regions (less than 25 inches of annual rainfall), provide 1 inch of water every 2 to 3 weeks during the first summer, then reduce to once per month in subsequent years. Do not fertilize native plantings. Fertilizer promotes weed competition and encourages leggy, floppy growth in species adapted to low-nutrient soils. Pull weeds by hand for the first 2 years until the native plants fill in and shade the soil surface. Once the canopy closes, weed pressure drops by 80 to 90 percent.
Long-Term Maintenance: What to Do and When
An established native planting (3 years and older) requires 4 to 6 hours of maintenance per year for a 200-square-foot area. The annual maintenance calendar consists of three tasks: cutting back, weeding, and dividing.
Spring Cutting Back
In late February to early March (before new growth begins), cut all dead top growth to 2 to 4 inches above the ground. Use hedge clippers, a string trimmer, or a mower set to 4 inches. Leave the cut material in place as a mulch layer. The decomposing stems return organic matter to the soil and provide overwintering habitat for beneficial insects (native bees, lady beetles, lacewings) that hibernate in hollow plant stems. Do not cut back in fall. Standing dead stems provide winter interest, catch snow for soil moisture, and supply seeds for birds (goldfinches, sparrows, juncos) throughout winter.
Annual Weeding
Walk the planting in May and again in July. Pull any invasive weeds that have established (thistle, bindweed, crown vetch, garlic mustard). Two 30-minute weeding sessions per year are sufficient for an established native planting. Spot-treat persistent perennial weeds with glyphosate applied with a sponge brush (paint the herbicide directly onto the weed leaves without contacting the native plants). In the first 2 years, weeding may require 4 to 6 sessions of 30 to 60 minutes each as the native plants establish and close the canopy.
Division
Divide aggressive native perennials every 3 to 4 years to maintain vigor and prevent them from crowding out less competitive species. Species that benefit from division: wild bergamot, black-eyed Susan, blue flag iris, and New England aster. Dig the clump in early spring (before new growth) or early fall (September). Divide into sections with 3 to 5 growing points each and replant immediately. Discard the center of old clumps, which produces weaker growth.