Learning Download: How to Grow Pyrethrum

Pyrethrum daisies are also known as painted daises. These flowers are commonly cultivated for their production of pyrethrins, which is a natural insecticide. Painted daises are native to southeast Asia. They are commonly grown in California or in other U.S. areas between the hardiness zones of 3 and 9.

Before Planting: Begin seeds indoors four to six weeks before the last frost date in your area.

Planting: You can sow seeds directly outdoors by planting them in a sunny area after all the chance of frost and when the soil is at least 50 degrees.

Watering: Soak the soil thoroughly when you water your painted daisies. Avoid overhead watering, as this can help prevent disease.

Fertilizer: Fertilize the plants early in the spring with a 5-10-5 fertilizer. Make sure you apply the fertilizer as the package directions imply.

Days to Maturity: Painted daises begin to bloom in late spring and early summer.

Harvesting: Like normal daisies, painted daises make great additions to a bouquet due to their long stems and full, long-lasting blooms.

Tips: Once the plants bloom the first time, you should then prune them to half their size to stimulate more growth.