Hey Growmie,
Yes, you can grow purple cannabis strains in a hot climate, especially indoors where you control the environment. While cooler nights can enhance purple coloring, genetics are the main factor. Many autoflower strains are bred to turn purple regardless of temperature. Great options include Purple Punch Auto, Blackberry Auto, and Purple Lemonade Auto from FastBuds, as well as Dark Devil Auto or Red Poison Auto from Sweet Seeds. These strains are colorful, potent, and finish quickly—perfect for warm indoor grows. To boost success, keep temps around 75–85°F (24–29°C), use LED lights to reduce heat, and maintain good airflow. If possible, lower night temps slightly to bring out more color. LST training also helps improve yields in small spaces. I've personally grown Purple Punch Auto, Dark Devil Auto, and Red Poison Auto indoors; if you'd like to check out those diaries, you can.