Markham Civic Centre, 101 Town Centre Blvd, Markham (Hwy 7 & Warden Av) North American Native Plant Society's annual fundraising sale of native wildflowers, shrubs, trees, ferns, vines, grasses & sedges. NANPS is a charitable organisation dedicated to studying, conserving, cultivating & restoring our native flora. Plants on sale are of local origin & provide food & habitat for birds, pollinator insects & other good critters. Admission free, including to book sale & to educational presentations at 11:30 & 12:30.