Dividing your orchids is an important step in expanding your collection as well as ensuring healthy growth for the future. There are a number of reasons why you may need to divide an orchid such as:
(1) out growing an existing pot and
(2) the deterioration of potting medium over time.
How Often Should You Divide?
Most orchid medium starts to deteriorate within two to three years. Refreshing the potting medium is important for the plant to absorb fresh nutrients and avoid root rot, fungus or bacteria. Depending on the orchid variety, most plants will be ready for splitting or a larger pot within two to three years of active growth.
There are two recommended times to divide your orchids:
Steps to Take When Dividing