There have been some threads about this in the past, and on other forums, but I tested the water with my highland Truncata, and have now moved onto watering all my plants with some cold coffee after seeing these results. This leaf unfolded about 1.5-2 months after I watered the plant with coffee (the next new leaf.) Amazing results if you ask me. Post your experiences. If I notice increased leaf size on my other plants that drank some joe, I'll update.