Orchid bark sizes for potting

Orchid repotting is important to do every 1-4 years, depending on the Orchid and how much the bark has broken down. More information on Orchid repotting is here.

For Phalaenopsis type Dendrobiums (the majority of Debdrobiums sold are this type), Dendrobium kingianum, and Dendrobium Nobile, fine bark should be used. Also, for Oncidiums, Odontoglossums, and warm and cool Pahiopedilums, and Miltonias, fine bark should be used.

For Phalaenopsis Orchids, medium bark should be used.

For Vanda Orchids and Cattleya Orchids, medium to large bark should be used. The hotter the climate, the bigger the bark.

For Cymbidiums, fine bark should be used.

You can find Orchid bark often at Home Depot and many other garden centers. Make sure it is a kind that can be used with Orchids, and the person selling the bark to you can tell you this or the packaging can.