The chamomile oil can be processed into pills, but the flower head can also be used as a whole to make use of the beneficial effect. It can be taken as a herbal tea, two teaspoons of dried flower per cup of tea, which should be steeped for 10 to 15 minutes while covered to avoid evaporation of the volatile oils.. Mature Size: 18″ x 12″. Full Sun (6+ Hours).