Orchids can be fussy flowers to cultivate; but the attractive blooms they yield are more than worth the effort. Here are several recommendations that will help your orchids to thrive.
Growing Medium: Orchids won't grow well in regular potting soil. This type of growing medium is usually too dense and can collect throughout the plant's roots and suffocate them. Rather than using ordinary potting soil, you'll need to use a specific orchid growing medium made up of a mixture of organic and inorganic materials. The orchids roots should be kept well ventilated by making certain that the medium isn't packed too densely and that you select a pot that is the right size for the plant. You don't want a container that's too large because it will hold a lot of liquid that your orchid doesn't want, which can bring about root rot.
Orchid Care - http://www.perennial-gardens.com/flower-articles/tips-for-growing-orchids.htm
Basics of Orchids - http://www.perennial-gardens.com/flower-articles/basics-of-orchid-care.htm