85 days. Cynara cardunculus. Perennial. Open Pollinated. Imperial Star Artichokes. The plant produces very flavorful 4 ½" diameter green artichokes. Imperial Star was developed for colder climates. This variety produces artichokes in the first season. Thomas Jefferson raised artichokes in Virginia back in 1767. Ideal for moist coastal areas. Try growing artichokes in your home garden. An excellent choice for home gardens, Farmer’s Markets, market growers, open production, and commercial production. United States Department of Agriculture, PI 542054. A variety from the USA.