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Trillium Landscape Design

Transform Your Garden into a Sustainable Sanctuary

About Us

Welcome to Trillium Landscape Design, a local landscape design company serving Greater Seattle. We’re passionate about creating sustainable, functional, and aesthetically pleasing gardens tailored to our client’s wants and needs. We’ll work closely with you to understand your vision and provide our expert guidance in order to bring it to life, one native plant at a time.

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We offer a variety of landscaping services to help you create the outdoor space that’s everything you’ve ever imagined and more.

Garden Maintenance & Pruning

Keep your garden healthy and thriving with our expert maintenance and pruning services.

Garden Design

Work closely alongside our team to develop an eco-friendly garden design plan, ready for installation.

Garden Coaching

Learn the fundamentals of plant and garden care through personalized coaching sessions.

Hardscapes and Installation

Upgrade the aesthetics and functionality of your outdoor space with a natural stone patio, walkway, or pathway.

Prioritizing Purposeful and Sustainable Design

At Trillium Landscape Design, we believe that gardening and ecological responsibility go hand-in-hand. This is why we approach each project with a “plant first” mentality, ensuring that our designs serve not just aesthetic purposes but also ecological. This includes using primarily native plant species, embracing wildlife, and prioritizing drought tolerance. Our approach allows us to create truly one-of-a-kind outdoor spaces and do our part to contribute to a healthier and more sustainable future.

Meet Our Founder


In March of 2023, we contracted with Brian to do pruning of our major trees and shrubs in our garden, including a dwarf Japanese maple. I could tell that Brian had excelllent training, as he takes much care in choosing where to take pruning cuts. He has also removed shrubs and moved and replanted other shrubs for us, also doing careful work and diligent clean-up. I highly recommend him.

Cathy Gibbins and Malcolm Harnois

Worked with Brian through the summer of 2023 to update our backyard, which included creating a larger patio, rebuilding two retaining walls, and incorporating NW native plants in our yard. Brian was very easy to communicate with and responsive to my texts and emails. He provided us with two initial design plans, and was happy to work with us to modify them to better suit our needs and stay within our established budget.

Amanda1 of 2

The work was completed in a timely manner, and Brian was clear about timeline expectations before he began. He was also flexible in changing plans as needed - for example, installing sod sooner than planned, to avoid the mess and inconvenience of a dirt lawn through the summer. Would highly recommend Brian for any and all landscaping needs! Thanks and hope all is well!

Amanda2 of 2

As a landscape architect, I have high standards for sustainable landscape maintenance. Trillium Landscape Design meets & exceeds all my expectations & needs. They are knowledgeable plantsmen & certified arborists. Their work is state of the art, done correctly & primarily with hand tools that nurtures a landscape to its best condition. A breath of fresh air. Forget those noisy & destructive mow & blow people. Trillium's the best choice for any landscape!

Peggy Gaynor
Our Design Process

Together, We'll Create A Living Masterpiece



This is where we learn about what you have in mind for your outdoor space. We’ll come out to your home, evaluate the characteristics of your yard, and follow up with a preliminary estimate.


If your project includes design, our designer will provide multiple concept drawings for your review and meet with you for collaborative feedback sessions. Your chosen design will then be refined into a preliminary plan along with a personalized plant list.


After a final meeting, we'll provide you with an install-ready plan and go ahead and schedule an installation time. Rest assured, our team will be here offering professional guidance throughout every step of the process.

Why Choose Trillium Landscape Design

Combining our exceptional skill & expertise with a customer-focused approach.

Personalized Attention

Our designers will work closely with you to understand your wants, needs, and preferences in order to create a garden truly unique to you.

Tailored Designs

Experience and creativity fuel us to create innovative & tailored designs that include distinctive features you are sure to love.

Horticultural Expertise

Our founder Brian boasts years of experience in the landscaping industry in addition to holding many arboricultural, horticultural, and ecology degrees and certifications.

Use of Native Plants

We strive to primarily use native plants in order to create sustainable, eco-friendly gardens that can thrive in the Pacific Northwest.

Contact Us Today

Ready to create your own beautiful and sustainable ecosystem?