Feverfew (Tanacetum parthenium) is a type of chrysanthemum that has been widely grown as a garden ornamental, and also for its herbal properties in the health-supplement industry. A herbaceous perennial that grows well in USDA hardiness zones 5 to 7, it will easily attain a height of 1 foot and often spreads up to 2 feet. From June to August, the plant produces an abundance of yellow and white daisy-like flowers.
When grown in overly hot climates, the plant often only grows as a biennial. Widely grown in a cottage garden setting, as a bedding plant, in rock gardens and in the front of the flowerbed. Feverfew offers ease of growth that often becomes invasive.
Plant in full sunlight. The area should offer well-draining soil conditions. Feverfew plants easily grow in clay, sandy conditions or loam.
Mix abundant organic matter such as peat moss and aged manure into the soil prior to planting feverfew plants. The soil should feel crumbly to the touch.
Apply 2 to 3 inches of mulch such as peat moss, leaf debris or bark chips around feverfew plants. Mulch will help protect the plant's root system in the heat of summer; it will allow the soil to retain moisture and will help keep weed growth down.
Maintain moist soil conditions around the feverfew plant. The plant does not tolerate drought and will easily die or become leggy if it does not receive ample amounts of water.
Prune away spent flower heads if seed production is not desired. Feverfew readily self-seeds and becomes invasive if not controlled. Pruning away the spent flowers before seeds are produced will limit the spread of the plant. Allow seed heads to form only if the spread of the plant is desired.
Cut foliage down to ground level after it dies in the late fall or early winter. In the spring, the feverfew plant will return.