The cacti families are succulents which store moisture in their pads, stems and trunks to use during dry and drought periods. They are generally found in desert conditions, although a few are tropical to sub-tropical. The plants favor sunny locations with plenty of heat, areas which have little to no rainfall and harsh soil.
Ferti-lome Cactus Mix is a real stand-out for versatility. This coarse mix with granite sand and extra perlite, duplicates conditions found in an arid environment. This heavy weight potting mix performs well under low water application.
Most cacti and succulents have an active period about 1/3 of the year. During this active period watering can be frequent and fertilizer applied. The most active time for most cacti is during the spring and early parts of summer. As this period passes, it is best to reduce the frequency of watering as winter approaches. They require very little water during the cold months. A good watering once a week in hot weather and once a month in the dormant period is a good point to start as you learn your plants needs. Another approach is when the soil is completely dry, water thoroughly then let dry. If in doubt, don’t water.