"Wild spinach about 7 feet tall and fully mature. Well-fed wild spinach is well-branched and produces a huge quantity of seeds when mature. The leaves are still edible at this stage but are reduced in quality, taking on a somewhat off-flavor. According to research on other mature plants, the leaves on these older plants retain most of their nutrients and phytochemicals as long as they are still green." Imagine what you could do with eighteen...