When you are given an orchid lei in Hawaii, the type of orchid it is made from is a vanda orchid. Native to southeast Asia, the vanda blossom can last up to a month and, despite its reputation as a difficult plant to grow and care for, the vanda does quite well as an indoor houseplant, given the proper care. The roots of the vanda orchid need air in order to grow and become healthy. Overall, the vanda orchid requires lots of humidity, too.
Plant your vanda orchid seedlings in the 3-inch basket using orchid mix, or make your own medium by combining fine charcoal, large perlite and shredded or chunky fir bark. Don't pack the mixture around the roots as they need a lot of air.
Pour the pebbles to the top of the shallow pan and fill the pan with water until just the tops of the pebbles are dry. Place the potted seedlings on top of the pebbles. This should provide your seedlings with the amount of humidity that they require. Add more water to the tray as it evaporates, keeping the top of the pebbles dry. You don't want the bottom of the baskets sitting in water.
Place the potted seedlings in a shady area of the home. As they mature, they will require more sunshine, but as seedlings they are a bit more delicate.
Maintain temperatures between 65 and 70 degrees Fahrenheit in the seedling's environment. Many orchids like warmer temperatures but the vanda prefers things a bit on the cooler side. The warmer it gets, the more humidity you will need to provide. Spraying the plant with a fine mist of water daily will provide additional humidity.
Water recommendations vary depending upon the medium in which the vanda seedlings are planted and the amount of humidity in the air. Water the seedling to keep the medium moist.
Fertilize the seedlings with SuperThrive, available online or at nurseries, twice a week. Dilute the fertilizer to half strength or according to package directions.