Seed bombing, a technique of introducing vegetation to privately owned land using bundles of soil containing seeds, has been around for decades but it's widely gaining mass appeal as an easy way to improve your backyard.

One of the newest versions of the "Green Guerrilla Grenade" is sold at Anthropologie and contain gumball-sized seed-and-soil pods that will "eventually bombard your yard with a bee, butterfly and bird-friendly wildflower mixture specific to the United States region of your choice".