Cultivate homegrown cures by potting plants known for their healing powers. Treat cuts and burns with the gel-like substance in the aloe vera plant’s leaves. Improve sleep and ease frazzled nerves with lavender. Clean the air of toxins such as formaldehyde and benzene with gerbera daisies, and grow your own vitamin C by planting a citrus tree—try a Meyer lemon tree on a sunny windowsill.