Abelia plants prefer moderate temperatures between 60-75°F (15-23°C). Humidity levels for Abelia should ideally be kept between 40-60%. If the air is too dry, you can use a humidifier or place a tray of water near the plant. If the air is too humid, ensure good air circulation around the plant. It is important to avoid placing Abelia plants in areas with extreme temperature fluctuations or near heating or air conditioning vents.