Mammillarias are relatively disease-resistant but susceptible to pests such as mealybugs and scales. Plant in a well-drained cactus mix. · learn how to care for fishhook cactus (mammillaria spp. ) with expert tips on light, watering, soil, temperature, propagation, common issues, and seasonal care. · this guide covers everything you need to grow mammillaria successfully — lighting, watering, soil, dormancy, common problems — plus photos and descriptions of the top species to start with. They are perfect cacti for beginners. See full list on worldofsucculents. com As with most cacti , mammillarias demand strong light for good form and good health. As with most types of cactus , mammillaria appreciate receiving a lot of light. You will learn about proper soil, light, temperature and other important things. They do not tolerate deep shade, but they can do well for many years on a sunny windowsill. If you grow cacti and succulents successfully, you will likely grow most mammillarias without much trouble. · place in full sun or bright, direct light. Fertilizer at the start of the growing season to encourage flowering. These cacti often occupy rocky terrain and exposed locations where they do not experience wet feet. · explore the diverse world of mammillaria cacti and learn how to care for these unique and charming plants. · learn how to how to care for mammillaria in our guide. Water sparingly in summer and not at all in winter. Mammillarias are popular cacti favored for their beauty and ease of care.