Rape (Napus)

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.

Plant Basics
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
Physical Characteristics
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
Gardening Characteristics
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
Growth Requirements
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
Sustainability & Use
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