This is my Darling Orchid which has been blooming for 4 months now – a good investment! I wish I could tell you exactly how often to water your phalaenopsis orchids and how much water to give them and be done with this post. So we water a 3.0" plastic pot with 3 oz of water and a 4.5" plastic pot with 4.5 oz of water. * Some moth orchids are grown in peat-type or sphagnum moss mixes. Specifically, I am speaking of Phalaenopsis orchids. How to Water Orchids. How much water to use when watering orchids potted in moss. Orchids such as cattleyas and oncidiums should be allowed to dry completely between waterings while orchids such as phalaenopsis and paphiopedilums that have no water storage organs should be watered before dryness occurs. Phalaenopsis orchids are the most readily available orchids and tend to be an orchid newbie’s first; however, many of these beauties don’t come with instructions. The bottom line is: Be sure not to over water your Phalaenopsis Orchids or use water that is high in salts. How To Repot Phalaenopsis Orchids: The Basics. This means the moisture is consistent, in most cases, but never excessive or boggy. Phalaenopsis orchids should be repotted about every two years or so. How to Grow Orchids in Water. These tend to dry out more slowly than bark mixes and may not need to be watered as often. Nighttime watering allows water to stagnate in the growing tips of phalaenopsis or the flower sheaths of Cattleyas. Unfortunately, there is no one size fits all answer. I started growing orchids, particularly phalaenopsis orchids, in water about a year ago after seeing the awesome root tips that grew in water on Sam Som’s youtube channel (Orchids & Puppies).Not all adapted well to this method, but overall, I’d say it is an amazing way to grow orchids, especially if you love being able to see all the lush, green, sexy root nubs like me. Irrespective of that, there are still wrong and right ways to water your orchids. Watering at night: No matter what kind of orchid you grow, always water in the morning. The poorer your water the faster it will decompose. Watering too often: Orchid plants should never be allowed to sit in still water. How to water your phalaenopsis orchid plant. Growing orchids in water provides the plant with a cultural situation that allows just enough moisture during the soaking and … This is the amount of water we use to water our Phalaenopsis potted in plastic pots, growing in greenhouse conditions: Pots sizes from 2.5" to 4.5": 1 oz of water per inch of diameter of the pot. Orchids have become very popular houseplants in recent years, with their delicate blooms adding elegance and allure to any room. Before getting into the details, here is a brief summary of what you need to know about how to repot phalaenopsis orchids. In this article, I’m going to talk about how to water orchids indoors. (Right) The roots on this phalaenopsis orchid … Epiphytic orchids grow in very little soil and grab much of their moisture out of the air. More Information on: How to Care for Orchids; How to Care for a Phalaenopsis Orchid Orchids are popular as houseplants, and wonderful varieties can be found in nurseries and garden centers. But for beginners, knowing how to water orchids may seem a bit daunting, since they are unlike other common houseplants.