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. This means the moisture is consistent, in most cases, but never excessive or boggy. 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. Before getting into the details, here is a brief summary of what you need to know about how to repot phalaenopsis orchids. * Some moth orchids are grown in peat-type or sphagnum moss mixes. Much of the sphagnum moss and sphagnum peat moss we see here in nurseries and big box stores comes from Canada. Always. Orchids are popular as houseplants, and wonderful varieties can be found in nurseries and garden centers. These tend to dry out more slowly than bark mixes and may not need to be watered as often. * Phalaenopsis orchids in sphagnum moss should be repotted when the moss starts to break down or looks soggy. Growing orchids in water provides the plant with a cultural situation that allows just enough moisture during the soaking and … Orchids grown in water experience what epiphytic forms of the plant might undergo. Proper watering is key to maintaining a healthy and happy orchid plant, so I’m here to offer up some advice on how to water a Phalaenopsis orchid. Personally, I do have my favorite method but what works best for me may not work best for you. This rule applies to all orchids with slight variations depending on whether your plant has the ability to store water or not. Epiphytic orchids grow in very little soil and grab much of their moisture out of the air. How to Grow Orchids in Water. Watering too often: Orchid plants should never be allowed to sit in still water. How To Repot Phalaenopsis Orchids: The Basics. This is my Darling Orchid which has been blooming for 4 months now – a good investment! 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. In this article, I’m going to talk about how to water orchids indoors. Peat moss is then processed into a soil amendment that is also a media used with orchids but it is markedly different in appearance and texture. When it comes to watering any plants there are lots of factors to consider that’ll make the amounts and regularity vary. Unfortunately, there is no one size fits all answer. 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. How much water to use when watering orchids potted in moss.