Mile-a-minute and Japanese stilt grass have taken hold in parts of my woodland, while heavy rains unexpectedly cleared the duckweed from my pond. Amid the weeds, ferns, an old stone wall, and Blackberry Lilies offer a reminder: We aren't meant to tend everything at once.

Of all Suzanne's perennials, only her Blackberry Lilies were competing heartily with the Stilt Grass, and so, I guessed they too might be considered invasive. Maybe not! One of the joys of working with fellow gardeners is learning about unusual plants. Plus, how to remediate invasive