Whitwam Organics
Milkweed- Swamp (Asclepias incarnata) (Florida Native)
Milkweed- Swamp (Asclepias incarnata) (Florida Native)
Couldn't load pickup availability
Milkweed- Swamp
Asclepias incarnata
Asclepias incarnata, the swamp milkweed, rose milkweed, rose milkflower, swamp silkweed, or white Indian hemp, is a herbaceous perennial plant species native to North America. It puts out a generous amount of pink to purple vanilla scented flowers in late Spring to Summer. Asclepias incarnata is quite common and is considered an important food source for the Monarchs as they start their spring migration northward. Swamp Milkweed can adapt to almost any Florida soil type. Save the well amended areas for the fruits and veggies. Native to most of the US, Swamp Milkweed is very heat and mildly drought tolerant when established, however it needs regular watering throughout it's early days. It prefers and tolerates very moist areas for long periods of time, making this a great choice for Florida gardens. They adapt well to low lying pastures and ditches. Direct sow in the Fall to let the seeds over-winter for a Spring and Summer bloom. If planting seeds in the late Winter or Spring, the seeds need 2-4 weeks of cold/wet stratification. Swamp Milkweed forms a cluster of 3-5" long tuber like roots, which it will come back from year after year.
| Days to germination | 10-15 days with Sunlight |
| Days to maturity | 180 |
| Plant time | October- May (Perennial) |
| Spacing | 18-24 inches |
| Sun | Full sun to part shade |
| Soil temperature | 55-78 degrees F |
| Optimum soil P.H | 6.0-7.5 |
| Height | up to 4ft |
| Harvest | May-August |
Share

Shop Plants & Seeds
-
Shop Live Plants
Behind on your garden this season? ...
-
Native, Heirloom, & Florida-Friendly
Gardening in Florida doesn’t have to be a constant battle—when...
-
Fall Staff Favorites
Not sure what to plant in your fall vegetable garden? Start here...
Over 800 5-Star Google Reviews
-
★★★★★
“All items arrived quickly and well packaged. I usually expect to have one or two live items out of a batch, but they are all thriving. I couldn’t be happier!”
David L.August 2026 -
★★★★★
“My live plants were packed like they belonged in Ft Knox. 😂 They really were packed beautifully. Only one plant, a bee balm, is questionable but signs that it will recover are happening. All in all I am thrilled with my plants and seeds. Some of my coreopsis have already sprouted!”
Jacquie R.September 2026 -
★★★★★
“Plants were ready quick at a good price with great packaging. Very happy with my purchase.”
Will B.May 2026 -
★★★★★
“I’ve ordered seeds from Whitwam Organics 3 or 4 times now. I love the simple packaging, clear planting guidelines, and variety they offer. Great germination rates!! The bare root plants I’ve ordered have come healthy, so healthy that the wild rabbits always approve of my menu upgrades! 😂🐰”
Chanda B.August 2026