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The Swamp Milkweed (Incarnata) 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 Swamp Milkweed (Incarnata) has green foliage and inconspicuous red flowers, with a moderate amount of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the fall, with fruit and seed production starting in the spring and continuing until fall. Leaves are not retained year to year. The Swamp Milkweed (Incarnata) has a moderate life span relative to most other plant species and a moderate growth rate. At maturity, the typical Swamp Milkweed (Incarnata) will reach up to 4.9 feet high, with a maximum height at 20 years of 0 inches.
The Swamp Milkweed (Incarnata) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by seed, 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 -38°F. has none tolerance to drought and restricted water conditions.
| Category | |
|---|---|
| Growth Rate | Moderate |
| General Type | Forb/herb |
| Growth Period | Spring |
| Growth Duration | Perennial |
| Lifespan | Moderate |
| Plant Nativity | Native to U.S. |
| Commercial Availability | Routinely Available |
| Bloom Period | Fall |
|---|---|
| Displays Fall Colors | No |
| Shape/Growth Form | Rhizomatous |
| Drought Tolerance | None |
| Shade Tolerance | Intolerant |
| Height When Mature | 4.9 |
| Vegetative Spread | Slow |
| Flower Color | Red |
| Flower Conspicuousness | Yes |
| Fruit/Seed Abundance | Medium |
| Fruit/Seed Seasonality | Spring Fall |
| Seed Spread Rate | Slow |
| Propagations (Ways to Grow) | Seed, Sprigs |
|---|---|
| Moisture Requirements | High |
| Cold Stratification Required | No |
| Minimum Temperature | -38 |
| Soil Depth for Roots | 18 |
| Toxic to Nearby Plants | No |
| Toxic to Livestock | No |
| After-Harvest Regrowth Rate | Slow |
| After-Harvest Resprout Ability | No |
| Responds to Coppicing | No |
| pH Range | 5–8 pH |
|---|---|
| Precipitation Range | 15–15 inches/yr |
| Planting Density | 3450–7200 indiv./acre |
| Soil Textures | Fine, Medium |
| Soil Depth for Roots | 18 |
| Minimum Frost-Free Days | 107 day(s) |
| Salinity Tolerance | None |
| CaCO3 Tolerance | Medium |
| Leaf Retention | No |
|---|---|
| Fire Resistant | Yes |
| Causes Livestock Bloating | None |
Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA
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