My 6 year old Sulcata lives outdoor most of the year in Houston, TX in about a 250 sq ft area. The grass didn't last long and my exposed clay soil is a sloppy mess. I have tried various substrates including hay, hardwood mulch, and potting soil. I am considering a mix of cypress mulch/coco coir but I don't like the idea of it ethically and the hot weather here will dry it out quickly and make it hydrophobic. I am almost certain the answer lies in a mixture of substrates and was wondering if anyone here had suggestions. Thanks!