So I don't know about you, but I knew most of these "forgotten" facts and I wouldn't even call them "forgotten," more ignored.
The one I didn't know was that Washington grew hemp!
Like other farmers, Washington grew hemp as a cash crop, but it’s not what you think. The hemp wasn’t smoked for pleasure. It was used to make rope, paper, and other products. Washington also grew corn and wheat. He was actually quite an agricultural innovator; he introduced the concept of crop rotation. Washington, the farmer, introduced the mule to America when he bred donkeys from the King of Spain and the Marquis de Lafayette with his own horses. He had 57 mules at Mount Vernon at the time of his death.