| Masterwort | |
| Great Masterwort | |
| Greater Masterwort |
| Plant Habit: | Herb/Forb |
| Life cycle: | Annual |
| Sun Requirements: | Partial Shade to Full Shade |
| Water Preferences: | Mesic |
| Minimum cold hardiness: | Zone 8a -12.2 °C (10 °F) to -9.4 °C (15 °F) |
| Maximum recommended zone: | Zone 3 |
| Flowers: | Showy |
| Flower Color: | White Yellow |
| Flower Time: | Late spring or early summer |
| Uses: | Guardian plant |
| Propagation: Seeds: | Sow in situ |
| Pollinators: | Beetles Cleistogamous |
| Conservation status: | Near Threatened (NT)
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