Opuntia sp. "BAKAMI" ex Thailand (unrooted) 5Q5

Opuntia sp. "BAKAMI," coming from a private collector in Thailand, is a rare and cultivar within the wide and diverse Opuntia genus, commonly known as the prickly pear cactus.

Here's a consolidated guide that should help you with cultivating most Opuntia species, including rare ones like "BAKAMI":

1. Light and Temperature: Opuntia species thrive in full sun exposure and are best suited to hot temperatures, although they can tolerate a wide range of temperatures. They are desert cacti that require maximum sunlight to flourish​.

2. Watering: These cacti require very little water, being drought-resistant plants that grow best in hot, dry areas. Overwatering can cause root rot, so it's essential to let the soil dry completely between watering sessions​.

3. Soil: Opuntias need well-draining soil. A basic potting soil is fine, but they will grow in rock gardens as well. The soil needs to drain well to prevent moisture accumulation and potential root rot​.

4. Propagation: They can be propagated either by cuttings or seeds. For cuttings, sever pads from the plant, allow them to dry to heal the wounds, then plant them in dry soil, avoiding water until they begin to grow to prevent rot. For seeds, rinse off the pulp, dry them thoroughly, and plant in well-drained soil, keeping them dry​.

5. Repotting: Opuntias can be grown in pots or directly in the garden. When repotting, ensure the soil is dry, remove the cactus carefully, treat any cuts with fungicide, and then plant it in a new pot with fresh, well-draining soil, avoiding water for a short period to prevent root rot.

6. Fertilizing: While specific fertilization recommendations for "BAKAMI" are not available, general advice for Opuntias includes using a balanced fertilizer for young plants and a low-nitrogen formula for established plants to promote flowering and fruiting. Fertilization should be done sparingly, as these cacti are adapted to nutrient-poor environments​.

For enthusiasts or collectors seeking to expand their collection with unique or rare specimens like "BAKAMI," participating in cactus and succulent society meetings, exhibitions, or online forums could provide valuable insights and opportunities to exchange cultivation tips and potentially acquire rare plants.