13. Begin a guerrilla garden uprising. Green thumbs often have private plots and backyards to grow, but they can also get on the front lines. Surreptitiously filling in unkempt lots or small patches of untendered land with plants and flowers, or tossing a "seedbomb" at a hard to reach patch of land, turns lost space into lush greenery. Richard Reynolds, one of the leaders of the movement, maintains a blog with invaluable tips on how to reclaim "unloved public spaces."
Learn about guerilla gardening. There are many approaches.
Make seed bombs. Choose species native to your locale and they will need little if any care to thrive.
Make moss graffiti. Important tip: take your seed moss from the type of substrate you plan to paint. Dirt mosses won't grow on rocks.