Duration: Perennial (A plant or plant species with a normal life cycle exceeding two years.)
Habit: Herb (A plant species lacking woody tissue when mature.)
Height: 3 feet to 5 feet
Spreading: Spreads underground by rhizomes like other members of the mint family. Can spread rapidly but shallow roots are easy to remove.
Bloom Color: Purple, Pink
Bloom Time: Aug, Sept, Oct, Nov
Soil Moisture: Wet, Medium-Wet, Medium (Moist most of the year and after heavy rains)
Light Requirements: Sun, Part-Shade (Minimum 3 hours of direct sun, flowering more with 6 hours of direct sun)
Propagation: Division of roots or seeds. Cold moist stratify seeds for 60 days at 40 degrees F. Divide clumps in early spring or late fall.
Additional Resources:
Lady Bird Johnson Wildflower Center (https://www.wildflower.org/plants/result.php?id_plant=phvi8)
Prairie Moon Nursery (https://www.prairiemoon.com/physostegia-virginiana-obedient-plant#panel-descrip)
Native Plant Network Propagation Protocol Database (https://npn.rngr.net/renderNPNProtocolDetails?selectedProtocolIds=lamiaceae-physostegia-745)
USDA Natural Resources Conservation Science (https://plants.usda.gov/plant-profile/PHVI8)