Greenhouse cooling Fan and Pad system –Large wet cellulose pad at one end of house –Fan at other end to draw air through pad –Cover pad during winter –Treat recirculating water with chemical Whitewash or Shade Cloth Ventilation –Reduces temperature –Supplies CO 2

Climate Control Systems Fan and Pad Cooling Gas Heaters

Greenhouse bench design and placement Stationary raised benches (most common) Rolling Double-tiered –Hanging baskets or for rolling outside Ebb and flood floor (post-propagation) Ground Bed –Hold flats or fill with substrate

Other Propagation Structures Hot frames –Smaller, low structures on the ground –Covered with poly, heated in winter –Same purpose as propagation house

Other Propagation Structures Cold frames –Similar to hot frame in size –Covered with poly or lath, not heated (sun only) –Used to condition or harden rooted cuttings or young seedlings before transplanting –Maintain high humidity initially to transition –Also used to start material late spring when no heat needed

Other Propagation Structures Lathhouses –Covered with shade cloth, lath, snow fencing is inexpensive option –Provide shade, reduce temperatures –Used for hardening off, acclimation