Q.Re-potting a Ponytail
Our Ponytail lives outside all year round and we have had it many years and it’s already in a large pot (which is heavy) and I don’t want to put it in a larger pot. It is very root bound with little soil so can I remove some of the roots to make room for some tub mix?

Certified GKH Gardening Expert
Since ponytail palms prefer to be root bound, it should be possible to keep your ponytail palm in its current container, but it would be good to replace the soil. If you can get it out of the pot, replace the soil and trim back any unhealthy roots. See these articles for more:
http://www.gardensalive.com/product/when-houseplants-get-pot-bound/you_bet_your_garden
https://www.gardeningknowhow.com/houseplants/hpgen/prune-roots.htm