Greenhouses can be elegant conservatories or compact greenhouses that fit into your garden. Whatever the size, similar suggestions for selection, design and installation apply. There are three major types of greenhouses to consider. The lean-to greenhouse is usually small, about 6 to 10 feet long. One of its long sides is formed by the side of the house to which it is attached. This is relativelt inexpensive.


Visit as many orchid greenhouses as possible, and consult books / consultants before making a final decision on building a green house. Where space is limited inside the home, window greenhouses offer a prime space in which to cultivate small-growing orchids. Opt for a model which prevents excessive heat, light and with more ventilation. Two or three shelves increase space; they may be solid, to prevent water from dripping on the plants below, or perforated to aid air circulation.








The optimum size with which to begin is a greenhouse 10-12 feet wide and 14 to 20 feet long. This affords a center bench as well as two side benches. Such a greenhouse may seem enormous at first, and unnecessary for an initial collection, but there are several factors to consider. First, those contemplating a greenhouse are serious about orchid growing. Consequently, the collection will inevitably grow by leaps and bounds. What seems to be adequate space today will become a major limitation in two years. Second, since a large greenhouse is preferable in the long run, it is less expensive to build it now than to add an extension onto a smaller one in the future.




In the Western Countries the green houses are made to capture maximum light. The glass houses used in these in countries are not suitable for India due to abundance of sunlight. In India Green or Black shade nets are used to filter the amount of sunlight. It is easy to cut down on light that is too intense; it is relatively impossible, however, to provide light when the greenhouse is shaded by forces beyond the owner's control. Hence it is better if the green houses are away from the shade trees. In planning the construction of a greenhouse, there are a number of factors to be considered. Most demand advise from a consultant.















Construct the height and width of benches for convenience, generally 30 inches tall and 20-30 inches wide. The center bench may be twice this width as it is accessible from two sides. The top surface of the benches should provide aeration and so should be formed either by redwood or cypress strips, spaced about their own width apart, or by a strong aluminum mesh. Air can thus circulate upward through the pots. Choose the metal which is resitant to damage from moisture.




Cooling & Ventilation

Except in very warm climates, a cooling system is usually not essential, because manual ventilation is adequate for those extra warm days. To grow odontoglossums and similar cool-growing genera, it may be advantageous, even necessary, to invest in an evaporative cooler in order to provide the low temperatures these orchids require. Automatic humidifying devices are necessary and should run in conjunction with adequate ventilation mechanisms. Side and roof vents operated automatically or manually, in addition to several fans running continuously, will keep the moisture-laden air moving freely throughout the greenhouse. Shading will depend largely on the characteristics of the particular climate and will have to be adjusted accordingly.


The foundation of a greenhouse is an additional but necessary expense. All greenhouses should have one. Ensure proper drainage.