Stores With Stories: Put a Plant on It Visit Buffalo Hass Avocado Fruit Tree Cold Hardy, Persea Americana Old Fiat Factory in Turin Italy, built in 1920s, recently renovated by Renzo Piano. On the roof the original test track is open to the public Stock Photo Alamy I tried banana peel fertilizer in my garden for a month and the results were incredible! Day 1: I soaked banana peels in water, packed with potassium, phosphorus, and calcium Flowers and a Hammer FanningSparks