Provide bright, indirect sunlight for your Mammillaria spinosissima. It can tolerate some direct morning sunlight, but intense afternoon sun can scorch the plant.
Allow the soil to dry out almost completely between waterings. Water sparingly, approximately every 2-4 weeks, depending on environmental conditions.
Mammillaria spinosissima, like other Mammillaria species, does well in low humidity conditions, making it suitable for indoor growing.
Maintain a warm environment, ideally between 70-100°F (21-37°C) during the growing season. It can tolerate cooler temperatures down to 50°F (10°C) in the winter.
Select a pot that provides a little room around the cactus, and be prepared to repot every 2-3 years when the plant outgrows its current container.
Feed your Mammillaria spinosissima with a diluted, balanced cactus fertilizer during the active growing season (spring and summer) every 4-6 weeks.
Use a well-draining cactus mix with added perlite or sand for optimal drainage. Make sure the pot has drainage holes to prevent water accumulation.
Remove any dead or damaged growth with clean, sharp scissors or pruning shears. Be cautious when handling the cactus, as it can be prickly.
Keep an eye out for common cactus pests, such as mealybugs and spider mites. If you notice an infestation, treat it with appropriate measures.