Michelle Obama stopped by David Letterman to promote her new book American Grown: The Story of the White House Kitchen Garden and Gardens Across America and of course to keep a buzz on the Presidential campaign. She shared some funny tips about gardening. Cute. Check it out inside.

No. 10: Gardening was invented in 1822 by Albert Gardener.

No. 9: Plant avocadoes, tomatoes, onions and cilantro together and grow a guacamole tree.

No. 8: Eggplants were originally cultivated for use as doorstops.

No. 7: In his lifetime, the average American will eat half a radish.

No. 6: The largest zucchini ever grown contained a Starbucks.

No. 5: Later this year the Supreme Court will finally rule on “tomato” vs. “tomahto.”

No. 4: If you have an actual green thumb, it might be scurvy.

No. 3: Lettuce is 96 percent water and 4 percent lettuce.

No. 2: The White House tool shed contains shovels, trowels and Weed Whacker One.

No. 1: “With enough care and effort you can grow your own Barack-oli.”