Swamp Loosestrife (Verticillatus)

The Swamp Loosestrife (Verticillatus) is generally described as a perennial subshrub or shrub. This is native to the U.S. (United States) has its most active growth period in the summer and fall . The Swamp Loosestrife (Verticillatus) has green foliage and inconspicuous red flowers, with an abuncance of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the mid summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Swamp Loosestrife (Verticillatus) has a long life span relative to most other plant species and a rapid growth rate. At maturity, the typical Swamp Loosestrife (Verticillatus) will reach up to 8 feet high, with a maximum height at 20 years of 0 inches.

The Swamp Loosestrife (Verticillatus) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, container, cuttings, seed. It has a slow ability to spread through seed production and the seedlings have medium vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -23°F. has none tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
General Type Subshrub, Shrub
Growth Period Summer, Fall
Growth Duration Perennial
Lifespan Long
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Mid Summer
Displays Fall Colors No
Shape/Growth Form Colonizing
Drought Tolerance None
Shade Tolerance Intermediate
Height When Mature 8
Vegetative Spread Rapid
Flower Color Red
Flower Conspicuousness Yes
Fruit/Seed Abundance High
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Cuttings, Seed
Moisture Requirements High
Cold Stratification Required No
Minimum Temperature -23
Soil Depth for Roots 10
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability Yes
Responds to Coppicing No
Growth Requirements
pH Range 5.2–7.2 pH
Precipitation Range 30–30 inches/yr
Planting Density 1200–1700 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 10
Minimum Frost-Free Days 145 day(s)
Salinity Tolerance None
CaCO3 Tolerance Low
Sustainability & Use
Leaf Retention No
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA