Parthenolide contents were determined by Dr. Branka Barl of Sask. Herb Research Centre. This study shows that feverfew can easily be grown under greenhouse conditions and could be geared towards parthenolide contents by stressing the plants. One crop can be harvested in 10 weeks and second harvest completed in 27 days. This means that 4 to 5 crops per year can be grown.
Plants are easy to dry and storage appears to be reasonable.
Further research will be conducted on organic production and nutrient requirements in relation to the development of parthenolide contents. A crop of Calendula officinalis was seeded on 12.04.96 in bedding plant trays using a standard soilless growing medium. The seedlings were transplanted on 24.04.96 in four inch pots containing a soilless growing medium. Flower harvest started on 23.05.96 and last harvest took place on 01.07.96. Number of flowers harvested per plant were 20.63.