One of the quickest ways to lose plant saving moisture from a container is through surface evaporation. This outrageously prolific chickweed explosion (the wee, low growing green plant with star shaped leaf clusters) slowed the moisture loss of this bin down by spreading over the soil surface like a chubby, lettuce cooling blanket. Less watering equals less work, and free chickweed equals a better profit on salad green mixes for sale. Check the last blog for an article about treating ulcers with chickweed, or search Stellaria Media for plant info. If you'd like to shoot straight down the native plant, medicinal/witchcraft rabbit hole, add Susan Weed to your search.