Just load these seedbomb slingshots with seedbombs and launch them into patches of bare earth on abandoned city lots during winter: You will be responsible for a plethora of beautiful blooms once spring arrives. The wooden slingshot and a ten-pack of seedbombs is only $10, making it an affordable way to encourage vacant lot beautification.
Implications - Seedbombs are made up of clay, compost and seeds. The seeds will blossom into a variety of different plants and flowers and "have the ability to lay dormant for up to a year." With just a little sun and water, the seedbombs will be growing in no time at all.