About 5 years ago, Sheridan Cleland of MyPDFscripts wrote the below article on his blog. Soon after, the site disappeared. I wanted to keep the memory alive, because these practices by the studios have not changed. They have only become worse.
Cacti are one of my favorite types of plants to grow inside all year and outside in summer. Unfortunately, the ambient air tends to stay moist during most seasons, a condition which makes cacti unhappy. Cactus potting soil can enhance drainage, increase evaporation and provide the dry conditions that cacti favor.
If you are moving your cactus outside for the summer, be sure to place it in a position of partial shade for the first few weeks, and slowly move it to a sunnier location. A plant going directly outside into full sun will likely be scorched by the more intense light found outside the home.f you want small specimens (less than one inch above the ground), you will want to grow lithops, which is Greek for living rocks. Other cacti which mimic the appearance of rocks include titanopsis, lapidaria, penestraria and gibbaeum. Some cactus and succulent types can be used as pot plants.