Flower yields of pot marigold (Calendula officinalis L.) plants as effected by flowering durations and number of harvests
Omer Caliskan and Dursun Kurt
Pot marigold (Calendula officinalis L.) is a medicinal plant used in pharmaceutical and cosmetic industries since ancient times. Today, as well as folk medicine, active ingredients are widely used medicines and pharmaceuticals. Flowers are quite rich in various active ingredients. Flowering durations of pot marigold is greatly influenced by available climate conditions. In this study, fresh and dry flower yields were investigated under ecological conditions of Samsun province. It was observed that flowering continued for about 4 months from the beginning of July until the end of October. A total of 24 harvests were performed throughput the vegetation period. Flower yields increased from the first harvest till the 10th harvest and then a decrease was observed in flower yields through the end of vegetation. The total fresh flower yield was calculated as 328.6 kg/da and dry flower yield was calculated as 56.68 kg/da. The average number of flowers per plant was calculated as 49.11.