Always water early in the day so that your orchids dry out by nighttime. The proper frequency of watering will depend on the climatic conditions where you live. In general, water once a week during the winter and twice a week when the weather turns warm and dry. The size of your orchid container also helps determine how often you need to water, regardless of climate conditions. Typically, a 6-inch pot needs water every 7 days and a 4-inch pot needs water every 5 to 6 days.
Here in Southern California, one orchid that grows extremely well is the boat orchid, Cymbidium. These types of orchids have been grown and depicted in drawings and poetry for more than two thousand years since the time of Confucius. They are still popular plants today because of the big, showy and long-lasting flowers. The pink, yellow, green, red, brown, peach or combination colored flowers also last superbly as cut flowers—if you change water daily and cut back the bottom of the spike, they can look pristine for a month or two in the vase.
I can control the chances of overwatering by taking them to the sink and letting the water all drain out. That’s the way they get watered in nature as they’re growing on other plants and rocks and those showers blow through. Second, these are tropical plants which like cozy conditions when it comes to temperature. I can’t image they like frozen water melting into them!
Most orchids are not heavy feeders. Many orchids bloom year after year with no fertilizer at all. During active growth, when new leaves are being produced, you may fertilize every other time you water at half the strength recommended on the fertilizer package. However, it's important to deliver water without fertilizer at least once a month to flush excess fertilizer salts from the bark mix and avoid fertilizer burn to the roots.