| Rockii Hybrid Tree Peony | |
| Tree Peony | |
| Peony |
| Cultivar Group (Type): | Suffruticosa Tree Peony |
| Season of bloom: | Very Early (week 1) |
| Flower Form: | Anemone |
| Flower Color: | Purple |
| Needs support: | Yes |
| Plant Habit: | Vine |
| Life cycle: | Other |
| Sun Requirements: | Full Shade |
| Water Preferences: | Wet |
| Minimum cold hardiness: | Zone 8a -12.2 °C (10 °F) to -9.4 °C (15 °F) |
| Maximum recommended zone: | Zone 13 |
| Fruit: | Other |
| Flowers: | Nocturnal |
| Conservation status: | Critically Endangered (CR) |
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