Thailand, Indonesia & Philippines
Vandopsis is slow-growing tropical epiphytes are robust and erect in growth habit and can grow to several feet in height. The fleshy leaves are strap-shaped and can grow to 24 inches in length.
The flowers are fragrant, showy and long-lasting, up to 3 or 4 months (Vandopsis lissochiloides). The flowers are yellow and spotted with brown or purplish blotches. On a well-grown plant, the inflorescence can reach 6 feet in length.
Vandopsis need high humidity and medium to high temperatures, bright light (but generally do not thrive in full sunlight ) and turbulent air flow. Water the orchids enough to keep them moist but not soggy. Soggy plants tend to rot. Use chunky bark medium or other gritty soil that doesn't hold onto moisture. These orchid plants need 80 percent humidity, In order to raise the level of humidity, spray Vandopsis orchids with cool water by using a spraying bottle or by a humidifier or spritzing the air. They flourish under overhead irrigation and bright sunlight.
Potting & Media
Grow these orchids in small deep pots to accommodate the large furry root system. Pot them in bark, perlite, charcoal along with sphagnum moss to retain moisture. Alternatively, substitute bark with coconut husk chips as they do not break down as quickly. Just be sure to wash coconut husk chips very well to get rid of any remaining salt before potting. Salt will burn orchids roots.
Use a balanced (such as 20-20-20) fertilizer applied full strength once a week during warm weather or use a one-quarter-strength solution at every watering. During cool or cloudy weather, apply fertilizer once every two to four weeks. Use a high-phosphorus fertilizer (such as 10-30-20) every third application to promote flowering. Remember; never fertilize an orchid that is completely dry, because this can cause major damage to the roots. Always water orchids very thoroughly once a month so that the excess fertilizer build-up can be removed.
Orchids should be watered regularly and abundantly. As a rule of thumb, you will want to water more frequently (approximately every 4-5 days) during the warmer months and less frequently (once a week) in the cooler months. During the growing season they require plenty of water and fresh air. Don't let the plants completely dry between watering.