A greenhouse also called as glasshouse is a structure with walls and roof made mainly of transparent material such as glass, which is used for growth of plants under regulated and controlled climatic conditions. Greenhouses enables production of crops at a time of year when they can’t be grown outdoors. Vegetables such as tomatoes, cucumbers, lettuces, zucchini, eggplants, spinach, pumpkins and fruits such as strawberries, melons, flowers such as roses, lilac, petunias herbs, geraniums, snapdragons, and marijuana are majorly produced under cover. In domestic greenhouses, the glass used is typically 3mm ‘horticultural glass' grade, which is good quality glass without air bubbles (which can produce scorching on leaves by acting like lenses). Tomatoes are widely grown in greenhouses, followed by cucumbers.