Before germination, keep standing water in the tray. If there is no water in the bottom of the tray, add some. Plants should germinate after 3-4 days. While the plants are young, i.e. up to the 4-5 leaf stage, the soil should be kept moist. After that the soil should be allowed to partially dry out periodically.
Plants grow better, and fungus and fungus gnat growth is retarded.
Be careful not to overfertilize. The first sign of underfertilization is when the rosette leaves or sepals of young flowers turn purple. The signs of overfertilization are leaves and inflorescences that turn yellow and inflorescences that become discolored, weak, flop over, and die. It is better to underfertilize than overfertilize, since overfertilized plants are unrecoverable. Generally, use very dilute fertilizer until the plants are just about to bolt, then add fertilizer later only if needed.