Orchids are perennial plants that grow attached to the trees rather than in soil. There are nearly 1000 genera and 25000 species of orchids which come with  distinctive features. A single plant can bear many flowers. Their blooms are mostly colorful and fragant. These plants are generally seen in the tropical regions of Africa. Hence the home growers should take care to provide a similar living atmosphere for your plants. These are generally easier to care for if such requirements are rightly met. They thrive even in sudden temperature or humidity changes.