Learn now to build your own passive solar cold frame at a workshop hosted by Hungry Mother Organics. A GE engineer will lead the workshop on how to easily build a passive solar cold frame. Simple design ensures maximum exposure to the sun, with exterior insulation and infared thermal film maintaining warmth throughout the cold winter nights. Workshop will be held at the HMO farmstand, 3190 Hwy 395, Minden. $10, June 16, 10 a.m. RSVP required. .