Garden Design Ideas for Slopes and Hillsides in Pennsylvania

Slopes offer ideal places to grow groundcovers, which stabilize soil, creep over boulders, and bring flowers to an otherwise vacant area.

 

Gardening on a slope doesn’t have to be an uphill battle. On the contrary, hillside landscaping is as much an opportunity as a challenge. From terraced gardens and warm microclimates to plant-studded rockeries, a downward grade can become the most uplifting asset of your yard. Here are the seven best solutions for gardening on a hill! 

 

7 Ways to Garden with Slopes in Pennsylvania 

 

1. Create a Rock Garden

The main challenge of hillside landscaping is to keep the soil in place. Rain and snow can wash away your soil over time, sometimes in a flash. Stabilizing hillsides with large rocks has long been a go-to strategy for the hillside gardener. Far from detracting from beauty, it allows you to create a magnificent rock garden.

 

2. Take Advantage of Microclimates 

At first glance, a hillside may seem like an obstacle to gardening, but it can create unique microclimates that allow you to grow special plants. A south-facing slope creates more warmth with a longer season of frost-free days, allowing you to grow heat-loving fruits and vegetables that may not otherwise grow in our climate. Think melons, peppers, and peaches! 

On the other hand, a north-facing slope may seem like a definite downside. They also form microclimates favorable to certain plants and can shelter shade-loving greens that need protection during the summer heat. Plenty of shade plants—like hostas, heuchera, and ferns—also love the moist and cool conditions of a north-facing slope.   

 

3. The Terraced Vegetable Garden

Besides stabilizing a hill with rocks, you can take a lesson from ancient agriculture and create a terraced landscape of vegetables. These beds can be more productive than a flat garden since the plants in front don’t block the plants behind, opening up more sunlight. Plus, they give you the alluring beauty and complexity of tiered gardens.

 

4. Stabilizing with Stone Walls 

A retaining wall is one of the best ways to keep your hillside landscape in place. Although initially a big investment, they’ll keep a slope in place for decades. Rustic stone walls can be the perfect places to grow flowers in the cracks or cover majestically with creeping plants and moss. The stones’ beauty brings other elements, color, and texture into your landscape.   

 

5. Gardening in Tiers 

With retaining walls comes the opportunity to landscape in tiers. Each tier becomes a unique garden of its own, presenting different opportunities depending on the microclimate. From a distance, tiered gardens resemble a wall of flowers, and walking through it, they become a waterfall of visual beauty, scent, and color.   

 

6. Stabilizing a Hill with Plants  

Plants are the best stabilizers of the living world. In a natural setting, they hold hillside landscapes in place, and we can easily take advantage of their skills on our slopes at home. Native plants are perfect choices for planting, and groundcovers protect the soil against erosion and cascade beautifully around other flowers down the hill.  

 

7. Alpine Rockery

A rock garden is only the beginning of the possibilities for creatively using a hillside. One step further is the full-on alpine garden. A mixture of boulders, large rocks, river rocks, and pea gravel creates the niche for an array of alpine flowers. These tough plants are at home in the nooks and crannies between stones. They hold the remaining soil in place while dazzling the senses from every crack and crevice.  

 

Common Questions for Hillside Landscaping in Pennsylvania  

 

What Are the Best Groundcovers for a Slope? 

Slopes offer ideal places to grow groundcovers, which stabilize soil, creep over boulders, and bring flowers to an otherwise vacant area. Beautiful options include creeping thyme, creeping phlox, stonecrop, and sweet woodruff, among many others. 

 

What Are the Best Plants to Plant on a Slope? 

Some plants are more suited to hillside climates than others. In particular, plants with dense fibrous roots do the best job of holding the soil in place. These plants include ornamental grasses, groundcover roses, creeping juniper, forsythia, Russian sage, and catmint, among many others. Annual flowers do not do a good job of holding the soil in place, and neither do plants with a taproot. It’s best to save those for flat or terraced gardens. 

On the north-facing slope, you’ll find that plenty of shade plants—like hostas, heuchera, and ferns—thrive in the moist, cool conditions, offering lush greenery and texture to your hillside garden.

Whether you’re a beginner gardener or a professional green thumb, hillsides offer rich places to experiment with different plants and styles. For more ideas on the best designs and plants for hillside landscaping, feel free to visit our garden center in Glenside, PA!