For years, Toni Genberg assumed a healthy garden was a healthy habitat. That’s how she approached the landscaping around her home in northern Virginia. On trips to the local gardening center, she would privilege aesthetics, buying whatever looked pretty, “which was typically ornamental or invasive plants,” she says. Then, in 2014, Genberg attended a talk by Doug Tallamy, a professor of entomology at the University of Delaware. “I learned I was actually starving our wildlife,” she says.