Choose your seed. Make sure it's the perennial appropriately named Roman chamomile. German chamomile is an annual.
Work your soil in the planting area. This should be an area that gets full sunlight and has good drainage. Prepare the soil by digging it up, turning it and loosening clumps of sod. Remove weeds and large stones. Add amendments such as pine straw or compost to enrich the soil.
Moisten the soil thoroughly. Then broadcast the seed. Sprinkle the planting area lightly again with water. The best time for planting is after the last frost of spring.
Keep the ground moist but not puddled for a week or two. As plants emerge, thin them to about every 6 or 8 inches. They'll grow into full plants within a month or two.
Add mulch around the plants to retain moisture. Use decomposed compost to fertilize periodically, or follow the directions on a box of organic fertilizer. Harvest as desired.