hi Doris, I woulddn't cut the roots, I would pull out the hole plant out the pot and put new potting mix at the bottm of the pot like an inch, or inch and a half, than place the plant back in. After that I would take the same amount of potting mix that I put at the bottom of pot from the top of your pot and use that to fill in the sides, it would be like if you were pulling out your plant an inch to expose the caudex one more inch. that way your caudex will keep growing, and you won't risk your plant loosing its bloom or getting root rot from cutting the roots as they can rot if cut and not cured before watering your plants, and you have to water so bloom or buds don't fall off. What is the fertilizer your use, is it all purpose 20-20-20 or a super bloom fertilizer like 10-50-5, some fertilizers can build up in the potting mix depending how much your water between fertilizing and this can cause leaves to curl up, it all depends on what pots you use, platic or clay and the potting mix, all these contribiute on how fast they dry out and how many times your water between fertilizing. Remember everytime you water your plants some of the fertilizer will come out the drainage holes, so if you don't water a lot between feedings it can build up and you end up giving your plants an overdose of fertilizer without wantting to. If you want you can skip a fertilizing and see what happens, If you can take a close-up photo of the leaves so I can see it maybe I can see if thats the case.
Hope this helps you Doris
Your Friend Wilfred
