It depends on what medium you are using, I think. I use small red lava rock and a basket pot so I water well, it drains and dries quickly and I water again. It doesn't like to get too dry and, yet, if you have a medium that is too compact, the roots will rot. I grew it under lights this past year and nearly killed it because the medium dried out too quickly. It is recovering very nicely, though, after all the heavy rains we had earlier in the summer and my daily watering. I have been growing my Psychopsis Mendenhall 'Hildos' for about five years, since it was not long out of flask, and, until growing it under the lights, never had any problems with it. Good luck with yours!