Genus Physostegia (Obedient plant)

Physostegia virginiana Photo/Illustration: Jennifer Benner

fy-so-STEE-jhah Common Name: Obedient plant

This genus is comprised of a dozen species of erect, deciduous, rhizomatous perennials from moist, sunny sites in eastern North America. Their square stems of often toothed leaves are topped by racemes of 2-lipped flowers that stay in a new position if they are moved on the stalks, giving rise to the name "obedient plant." They are attractive in a border, but some are aggressive growers.
Noteworthy characteristics: Tubular, 2-lipped flowers in shades of purple, pink, or white. Good cut flowers. Some species are invasive.
Care: Physostegia prefer fertile, reliably moist soil in part shade or full sun. Some species may need restraint.
Propagation: Sow seed in containers in a cold frame in fall, or divide in winter or early spring before new growth begins.
Problems: Sometimes bothered by slugs and rust.

Species, varieties and cultivars for genus Physostegia

Physostegia virginiana
(Obedient plant, False dragonhead) (1 user review)

Hardiness Zones:

1

2

3

4

5

6

7

8

9

10

11

Obedient plant is a clump-forming native perennial that grows aggressively. From midsummer to early fall, spikes of purple or pink (and sometimes white) flowers rise above sharply toothed leaves to four feet high.

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