"Seed. To make hemp seed, make hills of the form & size of cucumber hills, from 4 to 6 ft. apart, in proportion to the strength of the ground. Prick about a dozen seeds into each hill, in different parts of them. When they come up thin them to two. As soon as the male plants have shed their farina, cut them up that the whole nourishment may go to the female plants. Every plant thus tended will yield a quart of seed. A bushel of good brown seed is enough for an acre."
-- Thomas Jefferson
Here is some info about a lady named Elvie Musika, who lost the sight in one eye due to gloucoma, took the feds to court for the right to use MJ as medicine and won. The feds mail the MJ to her to this day. As she lost the sight in an eye before using MJ as medicine and still has the sight in her other eye since using the MJ as medicine, few can aruge with the results. Some still will, however.
I had lunch with Elvie one day. She showed me the big brown pill bottle that the feds shipped her the medical marijuana to her in. Inside the bottle were govenment rolled marijuana cigarettes, as big as a tobacco cigarette. Elvie is still getting her medical marijuana from the feds.
Elvie still has the sight in one eye, thanks to marijuana. Used as medicine. It worked.