Obedient Plant (Physostegia virginiana)

Obedient Plant (Physostegia virginiana)

Obedient Plant earns its charming name from a curious botanical quirk: its individual flowers can be pushed to either side of the stem and will stay in that position — obediently holding wherever you place them. In the Louisiana garden, it is anything but obedient in its growth — spreading vigorously by rhizome to fill moist garden spaces with tall spikes of rose-pink to lavender flowers that hummingbirds and bumblebees find irresistible.

Botanical Profile

• Family: Lamiaceae (Mint family)
• Native Range: Eastern and central North America from Quebec to Florida and west to the Rocky Mountains; native to Louisiana's moist prairies, stream banks, and open woodland edges
• USDA Hardiness Zones: 3–9
• Mature Size: 2–4 feet tall; spreads aggressively by rhizome
• Bloom Time: August–October
• Sun: Full sun to part shade
• Soil: Moist to wet; tolerates clay and periodic flooding; thrives in rain gardens and wet meadow edges

Ecological Role

Obedient Plant's tubular flowers are perfectly shaped for ruby-throated hummingbirds, which are its primary pollinator during fall migration through Louisiana. It also supports bumblebees and specialist native bees. Its late-season bloom — August through October — makes it a critical nectar source during the fall migration window when many other plants have finished flowering. Its rhizomatous spread creates dense colonies that stabilize moist stream banks and provide cover for ground-nesting birds.

In the Living Canopy & Understory

Part of the Jardin — The Living Canopy & Understory collection at Big Mamou Enterprises, Obedient Plant is the fall garden's most enthusiastic spreader — filling the wet edges with rose-pink spikes and calling the hummingbirds in for one last feast before they head south.