sun gro horticulture 1410602.q08p black gold cactus mix (8 qt) (2 pack) sun gro horticulture black gold cactus mix 8qt our unique combination of perlite/pumice, earthworm castings and compost provides the perfect soil structure and drainage for all types of cacti, bromeliads and succulents. black gold cactus mix is the first step in creating your own beautiful garden oasis 2 pack