Feverfew, also called Tanacetum pathenium, is an herb used to prevent migraines. This plant grows 1 to 3 feet tall, producing little white daisy-like flowers with a yellow center from mid-summer to fall. Feverfew is hardy down to USDA zone 4, which means it survives in areas where the temperature stays above -20 degrees Fahrenheit. Knowledge of how to create the right environment for feverfew will help you create a healthy, attractive and useful plant.
Fill a seed flat in late winter with a mix of half peat and half perlite. Poke a 1 cm deep hole in the potting medium of each cell in the flat. Place a seed in each hole and leave the seed uncovered.
Place the seed flat in filtered or full sunlight. The feverfew seeds need light to germinate. Keep the potting medium evenly moist, but not soaked, to help with germination. Transplant the seedlings into larger pots as they begin to outgrow their cells.
Transplant the seedlings outdoors after the danger of frost passes. Look for an area with full sun or partial shade and rich, loamy, well-drained soil. Feverfew will survive in almost any soil, but grows best in this kind. Space multiple plants 12 inches apart in rows 16 inches apart.
Spread a 2- to 3-inch layer of mulch around the plants. This will keep competitive weeds from growing. Keep the feverfew evenly moist until it starts to grow in this new space. Rainwater will be sufficient after that point.
Fertilize the feverfew after it starts growing with a complete 20-20-20 fertilizer. Follow the directions on the package for application instructions.