Random attacks by Indian tribes. The frontier had swamps-to-mountainness terrain. Seeds didn't work in all parts of America, some lived healthy in one area while the same seed could die somewhere else there.
A. Frederick Douglass was an American social reformer, abolitionist, orator, writer, and statesman. After escaping from slavery in Maryland, he became a national leader of the abolitionist movement in Massachusetts and New York, gaining note for his oratory and incisive antislavery writings. He would not have ever supported Slavery.