Add 1 tsp. of liquid food coloring to 1 cup of water. Drizzle the colored water onto the soil surrounding the base of a plant. Wait 24 hours for the water to absorb. Apply another identical dose if the color change was not sufficient.
Vertical Succulent Planter. For a bare wall, such a planter becomes much like a living piece of art. Easy to grow plants include dudleyas and sedums. They grow very easily from cuttings. Once established, these plants require little water.