Under ideal conditions, Hoya Carnosa can bloom annually, usually during the warmer months. However, several factors can influence their blooming: Maturity: Younger plants might not bloom. They often need to reach a certain level of maturity before producing flowers. Light: Adequate bright, indirect light is crucial for blooming. Pruning: Avoid cutting off the long, thin tendrils/spurs, as these are where flower clusters develop. Once a spur has flowered, it can produce flowers again in subsequent years. Stress: Sometimes, a bit of environmental stress (like slightly cooler temperatures) can induce blooming. Fertilization: A balanced fertilizer can support overall health and promote flowering.