Care instruction.

• Watering: Allow the soil to dry out completely between waterings, especially during the winter months when the plant is dormant.During the growing season (spring and summer), water more frequently, but still ensure the soil is dry before rewatering.
• Soil: 
  A well-draining cactus mix or sandy soil is best for the Mammillaria Cactus. Good drainage is essential to prevent root rot. If using regular potting soil, mix in some perlite or sand to improve drainage.
• Temperature: This cactus prefers warm temperatures, ideally between 70-100°F (21-38°C) during the day. It can tolerate cooler temperatures but should be protected from frost. Keep it in a space that stays consistently warm.