Good internal air circulation at night and ventilation in the daytime is essential. High humidity appears to contribute to flower stalk stretching. Light Gerberas require high light intensities for good quality plants and a high flower bud count. For this reason, they are mostly produced in the spring and summer with the greater amount of production for the spring market. Gerberas appear to respond only slightly to photoperiod.
Short days tend to speed flower production while long days delays flowering.
Though many growers produce Gerberas with no photoperiod control. Some growers extend the photoperiod from October through March for four weeks only to get more vegetative growth before flowering. Extending the photoperiod for longer than four weeks can result in excessive foliage growth. Watering Gerberas should receive a thorough watering, and then be allowed to dry somewhat. This limits the growth of the flower step and discourages soil-born diseases.