Visit the Landscape of Linda B. Horn, a private garden in Spencertown, open for self-guided tours to benefit the Garden Conservancy, 10 a.m. to 4 p.m. No reservations required; rain or shine. Highlights include restored ecosystems of wetlands, a waterfall, native grasses, and woodland, a meadow that features green-headed coneflower, Senna, tick trefoil, switchgrass, Indian grass, red bee balm, and little bluestem, among other plants.