Most orchids which are suited for home culture are epiphytic jungle plants (in nature they grow perched high in the trees, clinging to branches or in the trunk apex of the tree). They derive their nutrients from the air, rain, and any decaying vegetation which the roots can contact. For success you will need to duplicate the native conditions as closely as possible.
Humidity
Orchids need high humidity of at least 50%. It is almost a necessity for the pots to be positioned above a tray filled with pebbles and water. The orchid pots themselves shouldn’t set directly on the pebbles though, because excellent drainage is essential. It is best to invert a pot over the pebbles and then use that as a stand to set the orchid’s pot on or hang the orchids above the tray. Misting the foliage is very beneficial, but this should only be done when there is sufficient light and air circulation so that the plants have a chance to dry before night.
Watering
Orchids should be watered about once a week when the soil becomes dry, but they must never be allowed to remain wet or soggy for more than a day or two at a time. It is best to use water which has been allowed to sit for 24 hours to allow the chemicals to dissipate, and always at room temperature. Feed your orchid with water soluble ‘orchid fertilizer’ every two weeks during the growing season.
