THE EFFECT OF TEMPERATURE AND LIGHT INTENSITY ON FLOWERING IN SAINTPAULIA IONANTHA WENDL
Stinson and Laurie (1954) have shown that the light intensity is very important for the flower formation in Saintpaulia. They found that the plants flowered with light intensities from 5000 to 13000 lux. Post (1942) recommended a light intensity of 10 000 to 15 000 lux for old flowering plants, and 5000 to 8000 lux for young vegetative plants.
In order to obtain more information about the effect of day and night temperature and the interaction between temperature and light intensity the following three experiments have been carried out.