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PlantSnap
Plant Care
Virginia marsh st. john’s-wort
(Triadenum virginicum)
Also Known As
Virginia marsh st. john’s-wort, Virginia marsh st. john's-wort, Marsh st. john's-wort
About This Plant
Triadenum virginicum is a flowering plant species native to North America. It typically grows in wetlands, swamps, and bogs. The plant produces small, star-shaped white flowers that bloom in late summer and early fall. It is a hardy plant that can tolerate a range of growing conditions.
Plant Care Instructions
Outdoor Size Range
18-24 inches (45-60 cm)
Light Requirements
Triadenum virginicum prefers full sun to partial shade. It can tolerate shade but may produce fewer flowers.
Humidity Needs
Triadenum virginicum prefers high humidity and can tolerate wet conditions.
Fertilizing Schedule
Fertilize once a year in the spring with a balanced fertilizer.
Pruning Guidelines
Pruning is not necessary for Triadenum virginicum. However, deadheading spent flowers can encourage more blooms.
Common Pests and Diseases
The plant is generally pest-free, but can be susceptible to root rot if grown in poorly-draining soil.
Indoor Size Range
12-18 inches (30-45 cm)
Watering Schedule
The plant prefers consistently moist soil and can tolerate standing water. Water regularly during the growing season and reduce watering in the winter.
Temperature Range
The plant can tolerate a range of temperatures from -40 to 100 degrees Fahrenheit (-40 to 38 degrees Celsius).
Growing Season
Triadenum virginicum grows in the summer and fall.
Growing Difficulty Level
Triadenum virginicum is a relatively easy plant to grow, as long as it is grown in the right conditions.
USDA Hardiness Zones
Triadenum virginicum is hardy in USDA zones 5-9.
Did You Know?
Triadenum virginicum has historically been used in herbal medicine to treat depression and anxiety.
