Swamp Sunflower (Angustifolius)

The Swamp Sunflower (Angustifolius) is generally described as a perennial forb/herb. This is native to the U.S. (United States) has its most active growth period in the spring and summer . The Swamp Sunflower (Angustifolius) has dark green foliage and inconspicuous yellow flowers, with a moderate amount of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the late summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Swamp Sunflower (Angustifolius) has a moderate life span relative to most other plant species and a moderate growth rate. At maturity, the typical Swamp Sunflower (Angustifolius) will reach up to 5.6 feet high, with a maximum height at 20 years of 0 inches.

The Swamp Sunflower (Angustifolius) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by seed, sprigs. It has a moderate 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 -28°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Moderate
General Type Forb/herb
Growth Period Spring, Summer
Growth Duration Perennial
Lifespan Moderate
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Late Summer
Displays Fall Colors Yes
Shape/Growth Form Rhizomatous
Drought Tolerance Medium
Shade Tolerance Intermediate
Height When Mature 5.6
Vegetative Spread Moderate
Flower Color Yellow
Flower Conspicuousness Yes
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Moderate
Gardening Characteristics
Propagations (Ways to Grow) Seed, Sprigs
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature -28
Soil Depth for Roots 6
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Slow
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 4–7 pH
Precipitation Range 25–25 inches/yr
Planting Density 3450–10912 indiv./acre
Soil Textures Coarse, Medium
Soil Depth for Roots 6
Minimum Frost-Free Days 160 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability High
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