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.
Warmer weather = more traveling. Don't let your houseplants suffer while you're away from home! Rig up this DIY self-watering wicking system. It's a surefire way to keep your plants happy and healthy using ordinary materials you probably already own!