I have had this Christmas cactus for 3 years. It was my mom's; she passed 3 yrs ago. It is in a 6 inch pot, no drain holes, but I'm sure there are stones in the bottom of it. Should I repot it or leave it alone until it starts to look stressed? It looks healthy and blooms about every 2 months. It explodes in December/January. This cactus just looks so big to be in a 6 inch pot, but it looks healthy.
Indoor Christmas Cactus
Certified GKH Gardening Expert
When your plant is done blooming it may be time to repot.
The lack of drainage holes is concerning, but you have done a great job in not overwatering it.
Care must be taken that the plant never sit in soggy soil as this will lead to root rot.
Here are a few articles for you with more information.