Native to north America, the elderberry plant is valued for its superior fruit which has high levels of Vitamin C. As a matter of fact, elderberries have been proven effective in fighting Avian flu as they are rich in antioxidants that support the body's immune system and fight free radicals. Usually ready for harvest in the fall, ripe Elderberries have an appearance of a micro-sized blueberry, with a firm texture and moderately juicy texture. Besides, they are very sour with a touch of sweetness. So, you'll need to cook them with sweetener to make them palatable.