Traditionally Phalaenopsis orchids are spring flowers, although these days they are available in flower year-round. Orchids actually like to have their roots restricted, however it is still good to do an annual check and repot if necessary. The start of the growing season is a great time to do this task.
1. Carefully ease the pot away and remove all the bark so you can see the root system clearly.
2. Healthy orchid roots will be a bright fresh green. Any dead and rotten roots can be cut off with clean scissors.
3. If you can get the roots back into the original pot without too much trouble, then there is no need to repot in a bigger pot. However, if you physically cannot get the root system back into the pot, then go for a clear orchid pot just one size up. Once you have the root system in place, then carefully add fresh orchid bark between the roots until the pot is full and the plant is secure.
4. If the roots are a silver colour, this means the plant is thirsty. You could use this opportunity to water the orchid by dunking the roots in clean tepid water. Use orchid feed to promote blooming.