The thelocactus genus, a group of cacti, requires specific yet straightforward care. Basic care needs involve full sun to partial shade, well-drained soil, moderate watering, and an environment within 50°F to 85°F. Common challenges include pests such as mealybugs and spider mites, root rot and other fungal diseases, and sensitivity to overwatering or under-draining. Seasonal considerations involve reducing water during winter dormancy and paying attention to temperature fluctuations, particularly shielding from frost in colder seasons.