Becoming plant wise means knowing plants. Wisdom is acquired and is developed by spending time, not just with plants, but also in nature. You know which plants produce every year and which have lean years, as well as those that are rare or abundant. You can know the name of the plant, and even how it's used. But it's not until you actually bite into the fruit, or taste the dish that has been prepared with wild plants, that you can fully appreciate and know the plants.