Chamomile are perennial plants, and once planted will grow year after year in the same spot. However every 3 years or so the plants will benefit from being lifted and divided in the spring.
Chamomile can be bought as small plants from a nursery or alternatively they can be raised from seed. Sow directly into the seed bed, or into plug trays and then harden off and plant out when big enough to handle
Chamomile should be raised from seed in spring, and Roman Chamomile can also be propagated by cuttings or division in summer.
Pick chamomile when the flowers are fully open, and dry thoroughly to store, and can then be made into chamomile tea (add about 1 heaped teaspoon of flowers per cup of tea and sweeten with honey).
Chamomile is also said to repel onion fly, and so makes a good companion plant. I have also read that when companion planted next to an ailing plant it will help revive the ailing plant… let us know if you have tried this and if it works.