It is important for captive iguanas to have a variety of leafy greens along with fruits and vegetables such as turnip greens, collards, butternut squash, acorn squash, mango, and parsnip.
en.wikipedia.org Other species of vegetables that grow well in an aquaponic system include beans, peas, kohlrabi, watercress, taro, radishes, strawberries, melons, onions, turnips, parsnips, sweet potato and herbs.
en.wikipedia.org The parsnip is rich in vitamins and minerals and is particularly rich in potassium with 375 mg per 100 g.
en.wikipedia.org Water hemlock also has a large swelling at the stem base which water parsnip lacks.
en.wikipedia.org