90% Cape Water Impairment Data Prompts Conservation Call for Native Landscape Mandates

Key Points

  • APCC reports 90 percent of Cape coastal embayments have unacceptable water quality linked to fertilizer use
  • Commissioners discuss shifting from voluntary native planting to regulatory mandates for developers
  • Expert warns against "wood mulch mania" and urges residents to accept brown, dormant lawns as a sign of good stewardship
  • Discussion highlights the role of native "keystone" species like scrub oaks and beach plums in protecting local biodiversity
  • Conservation Agent issues call for two new members to fill vacancies on the understaffed commission

Stark environmental data indicating that 90 percent of Cape Cod’s coastal embayments suffer from unacceptable water quality took center stage at Friday’s Harwich Conservation Commission work session. Kristen Andress, Director of Education and Outreach for the Association to Preserve Cape Cod (APCC), presented a sobering report linking local landscaping habits to a broader ecological collapse, including the loss of three billion birds across North America since 1970. The presentation, the third in a town series focusing on nutrient loading, sparked a discussion among commissioners and residents about moving beyond voluntary education toward strict regulatory mandates for developers.

Andress highlighted that the ideal of a lush, green lawn surrounded by ornamental vegetation is an unsustainable model that contributes to the overload of nitrogen and phosphorus in Harwich’s ponds and coastal waters. Noting that 2024 was the warmest year on record and the region is currently grappling with a significant drought, she urged homeowners to embrace a Cape Cod lawn that goes dormant in the heat. If your lawn is brown in the summer, you're a good steward, Andress said, adding that native species are the true proven winners because they require no chemical inputs and are naturally drought-tolerant.

Conservation Agent Amy Usowski emphasized the commission’s dual role as both a regulatory body and an educational resource. I've been converting my yard over years, Usowski noted, sharing that her neighbors often comment on the abundance of butterflies and lightning bugs on her property. Chair John Ketchum noted the importance of the ongoing work sessions, stating that the meeting was intended to further the discussion of soil nutrients, native plantings, herbicides, and pesticides.

The commission members explored practical ways to implement these ecological standards. Member Sophia Pilling suggested that residents do not need to overhaul their properties overnight, advocating for a gradual approach. My husband really loves his small lawn, and we treat it like an area rug versus wall-to-wall carpeting, Pilling said. Member Wayne Coulson inquired about where residents can reliably source these species, asking if the APCC’s plant selector tool has information on where to purchase a lot of these plants. Andress confirmed that while the website doesn't list specific vendors to avoid the appearance of endorsement, most local nurseries have significantly expanded their native inventories.

The conversation turned toward professional accountability when Member Susan Cyr asked if the APCC maintains a list of landscape professionals who could help those people who aren't doing their own gardens but want someone with an ecological background. While Andress keeps an informal list, the discussion shifted to the role of developers when a resident named Patrick argued that the believers and followers in the room were not the problem. The developers are who are obliging homeowners who are clueless, he said, asking what could be done on the regulatory side to change town bylaws. Andress suggested that conservation commissions have the power to require native-only planting plans, while planning boards could mandate native pallets for all commercial projects.

This push for tighter controls aligns with Harwich's broader infrastructure protectionism, as boards increasingly prioritize town-owned natural assets over development pressures. However, the commission faces its own hurdles; Usowski concluded the session by noting that the body is currently seeking to fill two vacancies. This personnel shortage reflects a town-wide trend that has recently slowed activity on several other Harwich boards.