Best Plants for Steep Incline Landscaping

Landscaping a steep incline can be a challenging yet rewarding project. Whether you’re dealing with a hillside, embankment, or sloping garden bed, selecting the right plants is crucial for erosion control, soil stabilization, and aesthetic appeal. The ideal plants for steep inclines must have strong root systems to hold soil in place, be drought-tolerant (since water runs off quickly), and require minimal maintenance. This article explores the best plants suited for steep incline landscaping, grouped by category and climate adaptability to help you create a beautiful, sustainable hillside landscape.

Why Choose the Right Plants for Steep Inclines?

Before diving into plant selections, it’s important to understand why specific plants excel on slopes:

Erosion Control: Steep slopes are prone to soil erosion due to gravity and water runoff. Plants with extensive root systems stabilize soil by binding it together.
Water Retention: Plants help slow down water flow, allowing more moisture to penetrate the soil rather than washing away nutrients.
Low Maintenance: Slopes are harder to mow or tend regularly. Choosing hardy, drought-resistant plants reduces upkeep.
Aesthetic Value: Well-chosen plants add texture, color, and visual interest to an otherwise difficult landscape.

Now that we know the benefits of selecting appropriate vegetation, let’s explore some of the best options.

Ground Covers for Steep Inclines

Ground covers are an excellent first line of defense against erosion. They spread horizontally, covering the soil and protecting it from rain impact while their roots stabilize the substrate.

1. Creeping Juniper (Juniperus horizontalis)

Creeping juniper is a hardy evergreen shrub that spreads low across the ground. It tolerates poor soils and drought once established.

Root System: Extensive fibrous roots perfect for slope stabilization.
Growth Habit: Low-growing and mat-forming.
Sun Requirements: Full sun to partial shade.
Maintenance: Minimal; occasional pruning to maintain shape.
Additional Benefits: Provides year-round greenery and can act as windbreak.

2. Blue Star Creeper (Isotoma fluviatilis)

This low-maintenance ground cover forms a dense mat with tiny blue star-shaped flowers during spring and summer.

Root System: Fibrous roots that prevent soil displacement.
Growth Habit: Spreads quickly but non-invasive.
Sun Requirements: Full sun to part shade.
Maintenance: Requires occasional trimming to keep tidy.
Additional Benefits: Tolerates light foot traffic, suitable for pathways on slopes.

3. Vinca Minor (Periwinkle)

Vinca minor is an evergreen trailing plant with attractive purple-blue flowers.

Root System: Strong rooting helps in anchoring soil.
Growth Habit: Spreads rapidly; can cover large areas efficiently.
Sun Requirements: Prefers partial shade but tolerates sun.
Maintenance: Low; may need control if spreading too vigorously.
Additional Benefits: Deer resistant and drought tolerant once established.

Shrubs for Slope Landscaping

Shrubs add height variation and structure to sloped gardens while offering excellent erosion control due to their woody root systems.

4. Redtwig Dogwood (Cornus sericea)

Known for its striking red stems visible in winter, redtwig dogwood is both decorative and functional.

Root System: Deep and dense roots ideal for preventing landslides on slopes.
Growth Habit: Medium-sized shrub reaching 6–9 feet tall.
Sun Requirements: Full sun or partial shade.
Maintenance: Prune annually to encourage vibrant stems.
Additional Benefits: Attracts wildlife such as birds and butterflies.

5. Manzanita (Arctostaphylos spp.)

Manzanita is a drought-tolerant evergreen shrub native to western North America—perfect for dry slopes.

Root System: Fibrous roots help anchor rocky or sandy soils.
Growth Habit: Rounded form with smooth reddish bark.
Sun Requirements: Full sun exposure preferred.
Maintenance: Minimal watering once established; prune dead branches.
Additional Benefits: Attractive white/pink urn-shaped flowers in spring.

6. Lavender (Lavandula spp.)

Lavender thrives on sunny slopes with well-drained soils and adds fragrance and color.

Root System: Woody roots that provide stability without aggressive spreading.
Growth Habit: Compact shrubs growing 1–3 feet tall.
Sun Requirements: Full sun required.
Maintenance: Prune after flowering to maintain shape and vigor.
Additional Benefits: Pollinator-friendly; repels pests naturally.

Perennials That Thrive on Slopes

Perennials can provide seasonal blooms and diversity in texture while contributing to hillside soil retention.

7. Daylilies (Hemerocallis spp.)

Daylilies are tough perennials with fibrous root systems that hold up well on slopes.

Root System: Dense root mats prevent soil erosion effectively.
Growth Habit: Clumping habit with long strap-like leaves.
Sun Requirements: Full sun or partial shade.
Maintenance: Low; remove spent blooms for tidiness.
Additional Benefits: Wide variety of flower colors; deer resistant.

8. Sedum (Stonecrop)

Sedums are succulent perennials known for drought tolerance and shallow spreading roots that stabilize shallow soils.

Root System: Shallow but spreading roots help cover bare spots quickly.
Growth Habit: Low-growing mats or upright clumps depending on variety.
Sun Requirements: Full sun preferred.
Maintenance: Very low; drought tolerant once established.
Additional Benefits: Excellent fall color; attracts pollinators like bees and butterflies.

9. Blanket Flower (Gaillardia spp.)

This perennial offers bright red and yellow daisy-like flowers creating vibrant hillsides.

Root System: Fibrous roots help anchor loose soils on slopes.
Growth Habit: Clump-forming; grows up to 2 feet tall.
Sun Requirements: Full sun essential for blooming profusely.
Maintenance: Deadhead spent flowers; drought tolerant after establishment.
Additional Benefits: Long blooming season from early summer through fall.

Grasses and Grass-Like Plants

Ornamental grasses add movement, texture, and resilience to slope landscaping.

10. Blue Fescue (Festuca glauca)

Blue fescue is a clumping ornamental grass with striking silvery-blue needles that contrast well with other plants.

Root System: Fibrous roots bind soil effectively on hillsides.
Growth Habit: Tight clumps about 1 foot high and wide.
Sun Requirements: Full sun required for best color retention.
Maintenance: Minimal; cut back old foliage in late winter or early spring.
Additional Benefits: Drought tolerant; deer resistant.

11. Switchgrass (Panicum virgatum)

Switchgrass is a tall native grass that provides excellent erosion control through deep root systems.

–Root System: Deep perennial root network stabilizes soil layers deeply on slopes.
–Growth Habit: Upright bunchgrass reaching 3–6 feet tall depending on cultivar.
–Sun Requirements: Full sun preferred but tolerates partial shade well
–Maintenance: Cut back old growth annually in early spring
–Additional Benefits: Provides habitat for birds; colorful fall foliage ranging from orange to red hues

Trees That Can Handle Slopes

While trees require more space and care initially, selecting species adapted for steep terrain offers long-term stability benefits if space allows.

12. Eastern Redbud (Cercis canadensis)

A small deciduous tree with beautiful pink blossoms in early spring that adapts well to slopes with moderate moisture levels.

–Root System: Deep taproots coupled with lateral roots provide solid grip on hillside soils
–Growth Habit: Grows 20–30 feet tall; rounded canopy suitable as specimen tree
–Sun Requirements: Partial shade to full sun
–Maintenance: Low once established; prune dead wood as needed
–Additional Benefits: Attracts pollinators; brilliant fall foliage in yellow shades

13. Bald Cypress (Taxodium distichum)

Ideal for wetter bottom slope areas where drainage may accumulate, bald cypress is a deciduous conifer tolerant of flooding conditions yet stable in slope planting.

–Root System: Extensive buttressed root system stabilizes wet soils
–Growth Habit: Tall (up to 70 feet) but narrow pyramidal form
–Sun Requirements: Full sun required
–Maintenance: Low maintenance; adapts well after establishment
–Additional Benefits: Unique feathery foliage turns rusty orange in fall

Tips for Successful Steep Incline Landscaping

Plant selection alone does not guarantee success when landscaping steep inclines. Consider these additional tips:

Prepare the Soil Properly: Amend soil where necessary by adding organic matter or mulch to improve structure and moisture retention before planting.
Use Terracing or Erosion Control Fabrics if Needed: In very steep areas, terraces or geotextiles can support young plants until roots take hold.
Plant in Groups or Masses: Grouping plants creates a stronger root network and natural windbreaks that reduce erosion further.
Watering Strategy Matters: While many slope-adapted plants are drought tolerant once established, young plants will need regular watering during their first growing season—consider drip irrigation if accessible.
Mulch Generously Around Plants: Mulch reduces surface runoff speed and retains moisture around roots.
Regular Inspection After Heavy Rains or Storms: Check for any signs of soil movement or plant distress so you can take corrective action promptly.

Conclusion

Landscaping steep inclines requires careful thought regarding plant selection to ensure both beauty and functionality. Ground covers like creeping juniper or vinca minor provide excellent erosion control at the base level, while shrubs such as redtwig dogwood add seasonal interest as well as structural stability. Complement these with hardy perennials like daylilies or sedum that thrive under difficult conditions alongside ornamental grasses which bring movement and texture year-round. For larger-scale projects, trees like eastern redbud can anchor slopes effectively when space permits.

With patience, appropriate preparation, and choosing these resilient species, you’ll transform challenging steep landscapes into stunning gardens that stand the test of time—and weather—while enhancing your property’s natural appeal.