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The American Tarwort (Cernua) is generally described as a perennial shrub. This is native to the U.S. (United States) has its most active growth period in the summer . The greatest bloom is usually observed in the late spring, with fruit and seed production starting in the summer and continuing until summer. Leaves are retained year to year. The American Tarwort (Cernua) has a moderate life span relative to most other plant species and a slow growth rate. At maturity, the typical American Tarwort (Cernua) will reach up to 3 feet high, with a maximum height at 20 years of 3 feet.
The American Tarwort (Cernua) is not commonly available from nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, container, seed. 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 -23°F. has high tolerance to drought and restricted water conditions.
| Category | |
|---|---|
| Growth Rate | Slow |
| General Type | Shrub |
| Growth Period | Summer |
| Growth Duration | Perennial |
| Lifespan | Moderate |
| Plant Nativity | Native to U.S. |
| Commercial Availability | No Known Source |
| Bloom Period | Late Spring |
|---|---|
| Displays Fall Colors | No |
| Shape/Growth Form | Multiple Stem |
| Drought Tolerance | High |
| Shade Tolerance | Intolerant |
| Height When Mature | 3 |
| Flower Color | Yellow |
| Flower Conspicuousness | No |
| Fruit/Seed Abundance | Medium |
| Fruit/Seed Seasonality | Summer Summer |
| Seed Spread Rate | Moderate |
| Propagations (Ways to Grow) | Bare Root, Container, Seed |
|---|---|
| Moisture Requirements | Low |
| Cold Stratification Required | No |
| Minimum Temperature | -23 |
| Soil Depth for Roots | 6 |
| Toxic to Nearby Plants | No |
| Toxic to Livestock | No |
| After-Harvest Regrowth Rate | None |
| After-Harvest Resprout Ability | No |
| Responds to Coppicing | No |
| pH Range | 7–8.5 pH |
|---|---|
| Precipitation Range | 9–9 inches/yr |
| Planting Density | 10–3000 indiv./acre |
| Soil Textures | Coarse, Fine, Medium |
| Soil Depth for Roots | 6 |
| Minimum Frost-Free Days | 160 day(s) |
| Salinity Tolerance | Low |
| CaCO3 Tolerance | High |
| Leaf Retention | Yes |
|---|---|
| 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
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