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About Irwin Landscaping

Serving Northern Delaware and Southeastern Pennsylvania

For nearly four decades, Irwin Landscaping has been creating thoughtful, enduring outdoor spaces for homeowners throughout Northern Delaware and Southeastern Pennsylvania. But a landscape is personal, and choosing who brings yours to life should be, too. Take a few minutes to watch our videos, meet the people behind Irwin, and see how we approach design, planting, and the relationships that have shaped our work for generations.

The Irwin Story

Nearly four decades of thoughtful landscape design.

Irwin Landscaping has spent nearly 40 years creating distinctive residential landscapes throughout Delaware, Pennsylvania and Maryland. Rooted in landscape architecture, our approach combines thoughtful design, experience and a genuine appreciation for how homeowners want to live outdoors.

Our Design Process

Designed around the way you live.

Every project begins by getting to know the client and the property. We walk the site, talk about how you want to use the space and develop a plan around your lifestyle, priorities and budget. From patios and outdoor entertaining areas to intimate gardens and low-maintenance landscapes, the design grows from what makes sense for you.

Explore Our Process

Customer Reviews

“

Irwin Landscaping is an awesome company to work with. They do beautiful quality work, standing behind everything they do and have the best employees.

Guardian, New CastleGarden design, Hardscaping
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Excellent customer service, experienced plant people, beautiful design and maintenance. Highly recommend.

DonnaGarden design, Hardscaping
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Have used Irwin Landscaping for decades. They always do quality work and stand behind what they do.

JordanHardscaping, Yard grading
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Irwin Landscaping is amazing!

TimLandscape installations
Our Planting Philosophy

Native when it makes sense. Beautiful always.

We love native plants for their resilience, seasonal beauty and value to pollinators and local wildlife. But we do not believe every landscape has to be strictly native. Many of our gardens blend native and carefully selected non-native plants to create the right balance of color, texture, habitat and year-round interest for each property.

Meet Peter Irwin & Matt Frigm

For Irwin Landscaping, great landscape design starts with understanding the property, the people who live there and how the two can work naturally together. Peter Irwin and Matt Frigm bring experience, creativity and a genuine appreciation for the landscape to every project. Their approach combines thoughtful planning with an eye for the details that make an outdoor space feel personal, established and completely at home in its surroundings.

Peter Irwin

Founder & Landscape Architect

Peter's connection to landscape design began long before Irwin Landscaping. After earning his degree in Landscape Architecture from the University of Georgia, he returned to Delaware and began his career designing both commercial and residential landscapes. Nearly four decades ago, he founded Irwin Landscaping and began building the company around the work he enjoyed most — collaborating directly with homeowners. From expansive outdoor living spaces to quiet gardens designed simply to be enjoyed, Peter approaches each property by first understanding the people who live there. His greatest satisfaction still comes at the end of a project, when the design becomes more than a landscape and begins to feel like part of someone's home.

Matt Frigm

Landscape Designer

Matt brings a strong appreciation for gardens, plants and the outdoors to his work at Irwin Landscaping. His interest in how landscapes are shaped — from plant material and grading to hardscape and outdoor living spaces — informs an approach centered on creating properties that feel thoughtful, natural and individual to each client. Matt enjoys the possibilities that come from looking at a property as a whole and finding ways for each element to work together. For him, a successful landscape is one that feels effortless once it is complete — a space that fits the home, reflects the people who live there and simply makes spending time outside more enjoyable.

Case Study

Case Study: A Low-Maintenance Four-Season Garden

A Four-Season, Low-Maintenance Landscape Designed Around the Homeowner Every successful landscape design starts with more…
Case Study

Case Study: Landscape Design

For this property, Irwin Landscaping worked alongside the construction company throughout the project to help…
Blogs

Case Study: Native Planting and Hardscaping Renovation in Delaware

When the homeowners completed renovations to their house, the surrounding landscape remained largely unfinished. The…
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