A person wearing a large sunhat, black jacket, and black pants standing on a dirt trail in a forest with tall trees, observing a large tree root covered with green foliage.

Tahn Kehmeier | Landscape Designer

From rain gardens that capture and filter stormwater to water‑wise xeriscapes, I design resilient planting plans that:
  • Prioritize Willamette Valley native species that support local pollinators, birds, and beneficial insects.
  • Identify invasive weeds on your property that outcompete natives and degrade ecosystem function.
  • Match plant choices to site conditions (soil, moisture, sun exposure) to reduce maintenance and irrigation needs.
  • Layer vegetation for diverse structure—groundcovers,  shrubs, and trees—to provide habitat year‑round.
  • Use rain garden and bioswale principles to manage runoff, improve water quality, and recharge groundwater.
  • Implement xeriscape strategies—drought‑tolerant plants, efficient mulching, and thoughtful plant spacing—to conserve water while supporting biodiversity.
  • Provide phased planting and maintenance recommendations to ensure successful establishment and long‑term ecological benefit.
These approaches create landscapes that are beautiful, low‑input, and ecologically productive—supporting native species and increasing resilience across urban and suburban sites in the Willamette Valley.
Background: 
I began this journey with a Bachelor’s degree in Environmental Studies from Portland State University and an Associate’s degree in Landscape Technology and Design from Portland Community College. I spent several years working as a Backyard Habitat Technician for the Backyard Habitat Certification Program, helping homeowners create ecologically beneficial wildlife-supporting gardens. 
Other project experience includes installing edible gardens for Sunset Covenant Church and Community Cultivators,  creating a courtyard design for Taylor Street Apartments, an affordable income housing development, and collaborating on the King Elementary School nature playground in North Portland.