The seasonal cycle experienced by most gardeners around the world presents multiple opportunities for interesting gardening projects, but at the same time places unavoidable challenges upon those who would undertake these projects. While the ever-changing climate allows for a great variety of colours, smells and possibly tastes, it brings with it a variety of temperatures, humidity levels and insects that may deter you from a successful gardening endeavour. There are, of course, ways to get around such complications – ways that will be greatly beneficial to those intending to grow plants that require constant, unchanging climates. Many types of fruit and vegetables require this type of consistent conditions, and are very popular among gardeners due to the monetary and health benefits of growing your very own organic produce. One of the ways to avoid these complications would be to move to the places where these types of climate are available, a strategy inconvenient for most. A more practical method involves the construction of a greenhouse – a plastic or glass structure that keeps the warmth of the sun in to create an unchanging climate. As you might expect, the material (glass or plastic) that your greenhouse is made from must be of a certain quality and type. These special types of material allow the sun to freely warm up the greenhouse, while keeping the warmth inside the greenhouse all through the night and cold winter weather. To do this, greenhouses are constructed with as few openings as possible, so that the heat stored within has no way of leaving the structure. But what would happen to the plants if there was a week of snow and cloudy days? If the conditions within the greenhouse were not artificially controlled, the vulnerable plants would no doubt perish despite their glass shield. Therefore, the climate within the greenhouse must be carefully controlled – temperature, humidity and lighting must all be strictly regulated to ensure the continuing flourishing of the plants contained inside.