Cacti are famous for being very low maintenance-- a bright and sunny area of your home should do just fine. However, be aware that direct sunlight can cause burning and yellowing of your beautiful cactus. Watering is also simple with these small plants; once every 10 to 14 days, or whenever the soil is dry. Trichocereus Grandiflora, or the Torch Cactus, is famous for its very large red flowers, which will begin to appear as the cactus reaches maturity.