USDA Hardiness Zone (F):2 (-50 to -40 F), 3 (-40 to -30 F), 4 (-30 to -20 F), 5 (-20 to -10 F), 6 (-10 to 0 F), 7 (0 to 10 F), 8 (10 to 20 F) Siberian Iris are fuss-free and one of the easiest perennials to grow. They bloom profusely around May through June, then provide gorgeous green, grass-like foliage all summer. Siberian Iris compliment a variety of plantings and work will in most any any perennial garden or landscaped area. A great, must-have perennial. Grows about 3-4 feet tall. Full sun to part shade. Purple flowers. Zone 3-8. About Feedback, Case and Detail Seller Ratings: (1) As we are running business, any of your opened Case / Claim, Neutral/Negative Feedback, Low Star Detail Seller Ratings will be calculated as Bad Buying Experience and destory our account. If you have no big problem with the transaction, we will be REALLY appreciated if you can always leave us a Positive Feedback Seller Ratings, THANK YOU! (2) If you have any question or problem, PLEASE CONTACT US FIRST BY MESSAGE before leaving feedback, and we guarantee that your problem will be solved to your satisfaction! For most cases, problems are caused by misunderstanding which can be cleared through communication with a sincere heart. Please message me with any problems I am sure we can work it out! Just take a minute, send me a message and I am sure I can make you happy. I am very nice and try my hardest to treat my buyers the way I would like to be treated. Thank You, Syukur