USDA Hardiness Zone (F):5 (-20 to -10 F) The Heirloom Golden Yellow flowers of this plant will brighten any pond-side garden, or garden spot where the soil stays moist most of the growing season. These plants are hardy perennials and very easy to grow. Just plant the seeds in a starter pot or prepared ground, water regularly and watch them grow. They mature quickly in the summer and will be blooming in 1-2 years. NON-GMO Seeds 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