Plant Propagation:

1. Sow seeds directly in fall or spring.
2. Start seeds indoors 2 months before final frost- cold stratification required.
3. Winter sow for a natural cold stratification.
4. Divide plants in late spring.

Where do Asclepias incarnata grow?

Growing Conditions

Prefers neutral to slightly acidic soil but will tolerate heavy clay. Conditions Comments: With its showy flower clusters that attract butterflies and hummingbirds, swamp milkweed is underutilized in gardens. In moist soils or in a pond, it will thrive.

Where is the best place to plant swamp milkweed?

Swamp milkweed, as the name suggests, grows best in moist, wetland areas. It likes wet, clay soil, but it also prefers full sun. The plant is hardy in USDA zones 3 through 6, where it grows as a perennial. The plants spread naturally by wind-borne seeds and by creeping roots that spread out slowly under the ground.

Is swamp milkweed easy to grow?

Swamp milkweed is easy to grow from seed. To grow your own swamp milkweed, plant seeds in a pot outdoors in the fall, winter or early spring. The wet, cold conditions mimic wild seed propagation in nature and the seeds will germinate in mid spring.

How long does it take swamp milkweed to grow?

Swamp milkweed seed requires light for germination. Germination is poor at temperatures higher than 85 degrees Fahrenheit. Seedlings should not be transplanted until they have at least one set of true leaves. Allow 4 to 8 weeks inside growing time for seedlings before moving to a cold frame or transplanting outside.

Swamp Milkweed - Asclepias Incarnata. Facts, Grow & Care

15 related questions found

Does swamp milkweed need a lot of water?

Watering: Swamp Milkweed varieties need either a naturally moist environment or regular watering. Whorled and Common Milkweeds, as well as Butterfly Weed, are suited to a dry environment. Fertilizing: Milkweed does not require fertilization. This native plant performs well in poor soils.

Does swamp milkweed come back every year?

These native milkweed are perennials, meaning they come back year after year. Their aerial parts (flower, leaves, stem) die back but their rootstock remains alive throughout the winter.

Why is milkweed illegal?

Milkweed does contain toxins that can be harmful to pets, livestock and people. The milky sap for which it gets its name leaks out from the stem or leaves. This sap contains toxins called cardiac glycosides or cardenolides, which are toxic to animals if consumed in large quantities.

Does swamp milkweed bloom the first year?

Swamp Milkweed (Asclepias Incarnata) - This cousin of Butterfly Weed known as Swamp Milkweed blooms the first year from flower seed and tolerates heat, humidity, and even drought! ... Plants grow 4 to 5 feet tall and have clusters of pink to mauve flowers at the tops of branches.

How do you care for Asclepias incarnata?

1. Asclepia incarnata (Swamp Milkweed) needs evenly moist soils. ...
2. No fertilization needed.
3. No division required.
4. To avoid unwanted seedlings, remove all seed pods in early fall, before they split open and spread their seed.
5. Click here to compare all Milkweed plants.

How do you plant swamp milkweed?

Plant Propagation:

1. Sow seeds directly in fall or spring.
2. Start seeds indoors 2 months before final frost- cold stratification required.
3. Winter sow for a natural cold stratification.
4. Divide plants in late spring.

Should swamp milkweed be cut back in the fall?

It is recommended to prune the milkweed stalks to about 6 inches in height during the fall and winter months to discourage monarchs from establishing winter-breeding colonies. Cutting back the milkweed will also help to eliminate OE spores that may be present on the plant.

How deep do you plant swamp milkweed?

Sow four to eight weeks before the last frost in germination trays with cells, which are preferably two inches wide and four inches deep. Fill with a seedling soil mixture or a mix of sphagnum peat moss and vermiculite.

Why are my swamp milkweed leaves turning purple?

Swamp Milkweed in Fall / Winter

As Autumn approaches Swamp Milkweed leaves will turn red and purple. This is completely normal. It is the plants own 'Fall Colors' and makes for a beautiful display late in the season. After this, the leaves will turn brown and the seed pods will open up.

Is Asclepias incarnata invasive?

Swamp Milkweed (Asclepias incarnata)

Asclepias incarnata is a perennial, hardy in zones 3-8 (some reports include zone 9). It is a wetland plant but will do fine in medium moist conditions once established. ... Swamp milkweed is not invasive as some other milkweeds are and is well behaved in the garden.

Is Asclepias incarnata a perennial?

PLANT DESCRIPTION: Asclepias incarnata is an erect clump forming perennial that grows from a taproot. Plants have narrow lance shaped leaves with pointed tips and smooth margins.

Which milkweed is best for monarchs?

Three species have particularly wide ranges and are good choices in most regions: common milkweed (Asclepias syriaca), swamp milkweed (A. incarnata), and butterflyweed (A. tuberosa).

Is swamp milkweed aggressive?

Butterfly weed (Asclepias tuberosa) and swamp milkweed (Asclepias incarnata) generally are considered non-aggressive, attractive additions to home landscapes.

What happens if you touch milkweed?

All parts of the plant contain toxic cardiac glycosides, which can cause nausea, diarrhea, weakness, and confusion in small amounts, and seizures, heart rhythm changes, respiratory paralysis, and even death in large amounts. Milkweed can also irritate the skin and eyes if touched.

Where should you not plant milkweed?

Do not grow milkweed if you live near the coast

Milkweed should be planted only where it once occurred naturally and, north of Santa Barbara, it has never grown close to the coast. To grow it there could distract monarchs on their annual migrations. We only recommend planting milkweed more than 5 miles inland.

Is milkweed good for anything?

Although potentially poisonous, the plant has been used for medicinal purposes as well. Many indigenous tribes applied milkweed sap for wart removal and chewed its roots to treat dysentery. It was also used in salves and infusions to treat swelling, rashes, coughs, fevers and asthma.

Why is my swamp milkweed dying?

Funguses are often the result of too much rain or watering. ... It can also prevent another common fungus that causes milkweed to wilt and die.

Why butterfly bush is bad?

Because butterfly bushes offer copious amounts of nectar, they become extremely attractive to pollinators, distracting them from other native co-flowering species, and reducing the native's reproductive success which eventually also harms the native's populations.

How many milkweed plants should I plant?

For gardens, we recommend that you plant about 20-30 milkweed plants per 100 square feet. Milkweed plants should be spaced 1 foot apart, placed in clusters of 3-4 milkweeds.

Does swamp milkweed like wet soil?

Swamp milkweed is an excellent perennial for low sites or other moist locations in the landscape. Plants tolerate short dry periods, but prefer soils that are consistently moist or wet. Swamp milkweed requires full sun.