American Spongeplant (Spongia)

The American Spongeplant (Spongia) is generally described as a perennial forb/herb. 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 mid spring, with fruit and seed production starting in the spring and continuing until fall. Leaves are not retained year to year. The American Spongeplant (Spongia) has a short life span relative to most other plant species and a moderate growth rate.

The American Spongeplant (Spongia) is not commonly available from nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, seed. It has a slow 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 -24°F. has none tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Moderate
General Type Forb/herb
Growth Period Spring
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability No Known Source
Physical Characteristics
Bloom Period Mid Spring
Displays Fall Colors No
Shape/Growth Form Stoloniferous
Drought Tolerance None
Shade Tolerance Intolerant
Height When Mature 0.5
Vegetative Spread Rapid
Flower Color White
Flower Conspicuousness No
Fruit/Seed Abundance High
Fruit/Seed Seasonality Spring Fall
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Seed
Moisture Requirements High
Cold Stratification Required No
Minimum Temperature -24
Soil Depth for Roots 6
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 5–5.9 pH
Precipitation Range 35–35 inches/yr
Planting Density 10912–43560 indiv./acre
Soil Textures Fine, Medium
Soil Depth for Roots 6
Minimum Frost-Free Days 180 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Fire Resistant No

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