Broadleaf Signalgrass (Platyphylla)

The Broadleaf Signalgrass (Platyphylla) is generally described as an annual graminoid. This is native to the U.S. (United States) has its most active growth period in the spring . The greatest bloom is usually observed in the indeterminate, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Broadleaf Signalgrass (Platyphylla) has a short life span relative to most other plant species and a moderate growth rate. At maturity, the typical Broadleaf Signalgrass (Platyphylla) will reach up to 3 feet high, with a maximum height at 20 years of 0 inches.

The Broadleaf Signalgrass (Platyphylla) is not commonly available from 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 medium 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 Moderate
General Type Graminoid
Growth Period Spring
Growth Duration Annual
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability No Known Source
Physical Characteristics
Bloom Period Indeterminate
Displays Fall Colors No
Shape/Growth Form Bunch
Drought Tolerance Low
Shade Tolerance Intolerant
Height When Mature 3
Vegetative Spread None
Flower Color Green
Flower Conspicuousness No
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 17
Soil Depth for Roots 16
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 40–40 inches/yr
Planting Density 0–0 indiv./acre
Soil Textures Fine, Medium
Soil Depth for Roots 16
Minimum Frost-Free Days 180 day(s)
Salinity Tolerance Low
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
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