Tall and graceful, aromatic, medicinal and edible Bronze fennel also provides an attractive color and foliage contrast in the flowerbed or herb garden. Its feathery thread like leaves gives a smoky, effect that relieves a mass of more solid, leafy foliage. Not only that, it’s a superb habitat plant as it functions as a host plant for the Swallowtail Butterfly (and provides a wonderful eco-science project for the kids). Flat umbels of tiny, yellowish flowers appear in late Summer and should be harvested before they set seed to prevent a rash of unwanted seedlings. You can save the seeds for medicinal and culinary uses. 3-4’ tall. Well-drained loamy soil is best.