Heartleaf Arnica (Cordifolia)

The Heartleaf Arnica (Cordifolia) 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 Heartleaf Arnica (Cordifolia) has green foliage and inconspicuous yellow flowers, with an abuncance of conspicuous white fruits or seeds. The greatest bloom is usually observed in the late spring, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Heartleaf Arnica (Cordifolia) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Heartleaf Arnica (Cordifolia) will reach up to 1.5 foot high, with a maximum height at 20 years of 0 inches.

The Heartleaf Arnica (Cordifolia) is usually not commercially available except under contract. It can be propagated by bare root, container, corms, cuttings, seed, sprigs. It has a rapid ability to spread through seed production and the seedlings have high vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -28°F. has low tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
General Type Forb/herb
Growth Period Spring, Summer
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability Contracting Only
Physical Characteristics
Bloom Period Late Spring
Displays Fall Colors No
Shape/Growth Form Rhizomatous
Drought Tolerance Low
Shade Tolerance Tolerant
Height When Mature 1.5
Vegetative Spread Rapid
Flower Color Yellow
Flower Conspicuousness Yes
Fruit/Seed Abundance High
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Rapid
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Corms, Cuttings, Seed, Sprigs
Moisture Requirements High
Cold Stratification Required Yes
Minimum Temperature -28
Soil Depth for Roots 6
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Rapid
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 6–8 pH
Precipitation Range 10–10 inches/yr
Planting Density 1200–4800 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 6
Minimum Frost-Free Days 130 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