USDA Hardiness Zone (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), 9 (20 to 30 F), 10 (30 to 40 F). Season of Interest: Full Year. Bloom color varies greatly according to the soil pH. The blooms are tight hemispheres of large size. Bloom color varies greatly according to the soil pH, and when grown a pH of 6 it has blooms of varied color ranging from dark pink to deep blue. SHIPPED BARE ROOT. 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