The Master Gardeners of Erie County will hold three fall workshops. The cost is for the public is $20 per class or $50 for all three workshops; the cost for Master Gardeners is $15 per workshop. Class size is limited. Classes are: Hypertufa 10 to 11:30 a.m. Saturday, Sept. 9 Pavilion near tennis courts in Hamlin Park, S. Grove Street & Prospect Avenue, East Aurora Hypertufas are rustic, light-weight containers that look like stone, similar to ones used in English…