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The Rape (Napus) is generally described as a biennial forb/herb. This is not native to the U.S. (United States) and has its most active growth period in the fall and winter and spring . The Rape (Napus) has dark green foliage and inconspicuous yellow flowers, with an abuncance of conspicuous black fruits or seeds. The greatest bloom is usually observed in the early spring, with fruit and seed production starting in the summer and continuing until summer. Leaves are not retained year to year. The Rape (Napus) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Rape (Napus) will reach up to 4 feet high, with a maximum height at 20 years of 0 inches.
The Rape (Napus) is usually not commercially available except under contract. It can be propagated by seed. It has a moderate 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 17°F. has low tolerance to drought and restricted water conditions.
| Category | |
|---|---|
| Growth Rate | Rapid |
| General Type | Forb/herb |
| Growth Period | Fall, Winter, Spring |
| Growth Duration | Annual, Biennial |
| Lifespan | Short |
| Plant Nativity | Introduced to U.S. |
| Commercial Availability | Contracting Only |
| Bloom Period | Early Spring |
|---|---|
| Displays Fall Colors | Yes |
| Shape/Growth Form | Single Crown |
| Drought Tolerance | Low |
| Shade Tolerance | Intolerant |
| Height When Mature | 4 |
| Vegetative Spread | None |
| Flower Color | Yellow |
| Flower Conspicuousness | Yes |
| Fruit/Seed Abundance | High |
| Fruit/Seed Seasonality | Summer Summer |
| Seed Spread Rate | Moderate |
| Propagations (Ways to Grow) | Seed |
|---|---|
| Moisture Requirements | Medium |
| Cold Stratification Required | No |
| Minimum Temperature | 17 |
| 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 |
| pH Range | 6–7.2 pH |
|---|---|
| Precipitation Range | 40–40 inches/yr |
| Planting Density | 0–0 indiv./acre |
| Soil Textures | Fine, Medium |
| Soil Depth for Roots | 6 |
| Minimum Frost-Free Days | 130 day(s) |
| Salinity Tolerance | None |
| CaCO3 Tolerance | None |
| Leaf Retention | No |
|---|---|
| Palatability | Medium |
| 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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