Imperial Star artichokes grow up to four ft. tall and produce sweet and mild, 3-4.5 in. thornless flower buds the first year with yields up to 3 times higher than older varieties. Winter hardy to zone 7, Imperial Star artichokes were developed to promote heavy, annual production even in colder zones.
Growing Imperial Star Artichoke Seeds
For really big, heavy-flowering plants, start seed indoors in 4 in. containers, 5-6 weeks before the last spring frost. Plant only your best seedlings into the garden 3 ft. apart. Kept at 70-80°F., germination is in 8-12 days. About 20% of the seedlings will be of low vigor and should be discarded. In zones 7 and above, artichoke plants may be started from late spring through late summer, for large, productive plants the following season.
U.S. Shipping Rates
Free shipping on U.S. orders over $60.00.
Free priority shipping on U.S. orders over $150.00.
Standard U.S. shipping is $5.99.
Priority U.S. shipping is $9.99.
International Shipping Rates
Shipping to Canada is $13.99.
International shipping to all other countries is $15.99.
We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacements or issue a refund.