Why didn't Nanzhao use drugs to treat Magnolia grandiflora peach trees?

1, dioecious, Magnolia grandiflora and Prunus tomentosa may be dioecious, which means that male and female trees need to coexist to produce drugs. If there is only one sex of trees in Nanzhao area or the ratio of male to female of trees planted is unreasonable, it is impossible to bear medicine.

2. Pollination media is insufficient, so magnolia trees and peach trees need pollination media. If the pollination medium in Nanzhao area is insufficient and the weather is not suitable for pollination, it will also affect drug production.