The_420answered grow question 6y ago Hello, it all depends on the genetics and not just that. For colorful varieties, you often have to play with temperature differences. That's why outdoors, at the end of flowering and with cooler nights, it activates the production of those beautiful colors. Indoors, the same applies; play with the temperature between 15°C - 26°C. For example, with the Red Hot Cookies strain from Sweet Seeds, the percentage of getting a coloration is 60%. GOOD LUCK, look into strains with higher probabilities of coloration, like a Red Mandarine F1 from Sweet Seeds or those autos. Have a nice day! 😊