Geranium - One of the toughest plants in the shade garden, bigroot geranium (Geranium macrorrhizum) doesn't mind heat or drought. Plant it with: Add height and interest to your shade garden by planting bigroot geranium in front of toad lilies.
Three sisters: Plant corn, beans and squash together. Corn takes nitrogen, beans replace and grow up the corn stalks, squash is a natural "mulch" moisture barrier. Native American method I'm trying this this year!