Since most cold zone maps are based on a 25 year average, they can be totally meaningless in any given winter. Conditions vary with snow cover, early and late frosts, moisture in the soil and protection. You may even create your own micro-climate with protection between buildings, near trees, walls, etc. Plants that need shade in Arkansas may thrive in full sun when planted in Minnesota. We urge you to question zone maps and light requirements.
Many elements affect final plant performance results and stamina.
Use information you have gathered from personal results in your plantings, as well as facts gathered from industry research. 45 Bluebird Nursery, Inc.