Although they may look inert and lifeless, seeds are living entities. Every seed is a tiny plant-making factory. They contain embryonic tissue that begins to grow when the right conditions are met.

Hoop houses are greenhouses made by covering a plastic or metal hoop structure with one layer (or sometimes two) of clear plastic. They are low-tech and low-cost compared with glass greenhouses.

To start, if you purchase beverages that come in plastic cups ... To recreate the effect of a greenhouse on a smaller scale, you will add some type of clear cover to the cups.

These “greenhouses” go by several names including low tunnels, hoop houses and row covers and can be made of PVC pipe bent in a “U” shape and then covered with clear plastic or porous spun ...

Their mapping shows that greenhouse cultivation -- whether it takes place in glass houses or open fields wrapped in plastic films -- covers at least 1.3 million hectares of the Earth's surface.

Most greenhouses aren't an option for homeowners with smaller gardens and yards; however, Outsunny has a mini greenhouse that ...

To simplify this setup, look online for indoor greenhouse kits that include shelving, plastic covers, and grow lights. There are many options available, ranging in price from about $30 to $300.

Plastic sheeting is used as a covering to help let in plenty of light while keeping the cold out. The greenhouse is also heated, and can maintain a 40 deg F temperature differential with 14,000 BTUs.

Their mapping shows that greenhouse cultivation – whether it takes place in glass houses or open fields wrapped in plastic films – covers at least 1.3 million hectares of the Earth's surface.