Yellow Sweetclover (Officinalis)

The Yellow Sweetclover (Officinalis) is generally described as a perennial forb/herb. This is not native to the U.S. (United States) and has its most active growth period in the spring and summer . The Yellow Sweetclover (Officinalis) has green foliage and inconspicuous yellow flowers, with an abuncance of conspicuous yellow fruits or seeds. The greatest bloom is usually observed in the summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Yellow Sweetclover (Officinalis) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Yellow Sweetclover (Officinalis) will reach up to 6 feet high, with a maximum height at 20 years of 0 inches.

The Yellow Sweetclover (Officinalis) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by seed. 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 -38°F. has high tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
General Type Forb/herb
Growth Period Spring, Summer
Growth Duration Annual, Biennial, Perennial
Lifespan Short
Plant Nativity Introduced to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Summer
Displays Fall Colors No
Shape/Growth Form Single Crown
Drought Tolerance High
Shade Tolerance Intolerant
Height When Mature 6
Vegetative Spread None
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) Seed
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature -38
Soil Depth for Roots 16
Toxic to Nearby Plants Yes
Toxic to Livestock No
After-Harvest Regrowth Rate Slow
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 6.5–8.2 pH
Precipitation Range 17–17 inches/yr
Planting Density 0–0 indiv./acre
Soil Textures Fine, Medium
Soil Depth for Roots 16
Minimum Frost-Free Days 110 day(s)
Salinity Tolerance Medium
CaCO3 Tolerance High
Sustainability & Use
Leaf Retention No
Palatability Low
Fire Resistant No
Causes Livestock Bloating Medium

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA