Plan to do some guerilla gardening any time soon? Here is a tutorial on how to make seed bombs. These little bombs made of clay and filled with seed are a simple way to make your neighborhood a bit more green. Just throw them where you want flowers to bloom (or food to grow) and wait. Watering isn’t necessary, but you might want to keep an eye on the weather. Long periods of drought may require a follow up watering run. Before you know it you will be enjoying the sight of beautiful blooming sunflowers on that otherwise boring strip of land.