8 quarts xgarden cactus and succulent soil mix xgarden 8 quarts of horticultural grade premium cactus and succulent soil mix by xgarden. when potting succulents and cacti, it is important to use soil that is specifically formulated for these unique plants. succulents and cacti can't survive in standing water, so their soil must allow maximum aeration in order for these plants to flourish. this unique mix of peat moss, perlite, and vermiculite has been blended for maximum drainage and to encourage excellent root growth. this cactus soil will maintain a steady ph for plants.