Yellow Flatsedge (Flavescens)

The Yellow Flatsedge (Flavescens) is generally described as an annual graminoid. This is native to the U.S. (United States) has its most active growth period in the summer and fall . The greatest bloom is usually observed in the late summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Yellow Flatsedge (Flavescens) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Yellow Flatsedge (Flavescens) will reach up to 2 feet high, with a maximum height at 20 years of 0 inches.

The Yellow Flatsedge (Flavescens) is not commonly available from nurseries, garden stores and other plant dealers and distributors. It can be propagated by sprigs. It has a slow ability to spread through seed production and the seedlings have low vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below 42°F. has low tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
General Type Graminoid
Growth Period Summer, Fall
Growth Duration Annual
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability No Known Source
Physical Characteristics
Bloom Period Late Summer
Displays Fall Colors No
Shape/Growth Form Bunch
Drought Tolerance Low
Shade Tolerance Intolerant
Height When Mature 2
Vegetative Spread None
Flower Color Red
Flower Conspicuousness No
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Sprigs
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature 42
Soil Depth for Roots 8
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 5–7 pH
Precipitation Range 24–24 inches/yr
Planting Density 11000–18000 indiv./acre
Soil Textures Coarse, Medium
Soil Depth for Roots 8
Minimum Frost-Free Days 90 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Fire Resistant No
Causes Livestock Bloating None

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