Duckweed water is a fantastic, free, hyperlocal fertilizer that many gardeners overlook. Duckweed water is a fantastic, free, hyperlocal fertilizer that many gardeners overlook. When duckweed grows in a pond, rain barrel, or water feature, it absorbs and concentrates nutrients directly from the water, producing a mild but remarkably effective liquid fertilizer. Rich in nitrogen, … Continue reading Duckweed