ACRYLIC vs. Gel-Coat Fiberglass. Acrylic. One piece construction with dome. This adds strength to the unit and eliminates post installation. damage, no seams to caulk and gather mold and mildew, dome eliminates ceiling maintenance. Non porous surface, Easy to clean, no pores to catch soap, dirt, body oils.
In cold frame gardening, a cold frame is a simple structure that usually works like a mini-greenhouse. It has a wooden frame with a transparent roof made from glass and is always constructed low to the ground to provide proper insulation.
The planting zones, also called hardiness zones, divide the United States, Mexico and Canada into 11 areas. Each of the gardening zones is based on a 10 degree Fahrenheit difference in the average annual minimum temperature. Planting Zones 1 and 2a, the coldest, represent Canada. The United States falls within zones 2 through 10. Hawaii and Mexico are represented by zone 11, the hottest zone.