Swamp Azalea (Viscosum)

The Swamp Azalea (Viscosum) is generally described as a perennial shrub. This is native to the U.S. (United States) has its most active growth period in the spring . The Swamp Azalea (Viscosum) has green foliage and inconspicuous red flowers, with a moderate amount of conspicuous fruits or seeds. The greatest bloom is usually observed in the indeterminate, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Swamp Azalea (Viscosum) has a moderate life span relative to most other plant species and a slow growth rate. At maturity, the typical Swamp Azalea (Viscosum) will reach up to 16.4 feet high, with a maximum height at 20 years of 13 feet.

The Swamp Azalea (Viscosum) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, container, 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 -18°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Slow
General Type Shrub
Growth Period Spring
Growth Duration Perennial
Lifespan Moderate
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Indeterminate
Displays Fall Colors No
Shape/Growth Form Multiple Stem
Drought Tolerance Medium
Shade Tolerance Tolerant
Height When Mature 16.4
Vegetative Spread None
Flower Color Red
Flower Conspicuousness Yes
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Seed
Moisture Requirements High
Cold Stratification Required No
Minimum Temperature -18
Soil Depth for Roots 14
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 4–7 pH
Precipitation Range 35–35 inches/yr
Planting Density 700–2700 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 14
Minimum Frost-Free Days 160 day(s)
Salinity Tolerance None
CaCO3 Tolerance Low
Sustainability & Use
Leaf Retention No
Palatability Low
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