The petunia has never asked for much and has consequently been given garden borders and hanging baskets and the kind of passive appreciation that comes from something being reliably pleasant and never difficult. Avocado green changes the conversation entirely. The Avocado Green Petunia is a ceramic wall flower, 3.5 inches across, one screw, no water — the color of a strong opinion held quietly, of something that decided to be interesting on its own terms without making an announcement. The most surprising thing in the garden. It got there without anyone noticing it was trying.