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Asclepias purpurascens

Purple Milkweed

$0.00

Packet
Out of Stock

3 Pack
Out of Stock

The much sought-after Asclepias purpurascens, Purple Milkweed looks similar to Common Milkweed (Asclepias syriaca), but the flower color is a rich red-purple color compared to the soft gray-pink of Common Milkweed. There are usually one to three blooms that form near the ends of the stems in late spring, early summer.

The flower is held above the leaves on stems a bit longer then Common Milkweed’s and the umbel itself is stiff, and holds a nicely rounded form, while that of the Common will flop a bit. Blooms can last for about a month and if seed is not set it will occasionally re-bloom. The average height is around 3 feet, but it will sometimes go to 4 feet. The flowers will attract a variety of nectar-seeking insects from the very small to the large - Bumble Bees and of course, Monarch Butterflies.  The leaves are big, around 6-8 inches and they taper to a point at both ends. The mid-vein in the leaves is tinted with the same color as the flower.

Grow Asclepias purpurascens in a site that is well drained but has ample moisture. It seems to prefer a bit of shade but will do well in full sun if it gets deep, regular watering. This Milkweed will not spread aggressively like the Common does. The seed pods are smooth and a little more slender than those of Common Milkweed which has plump pods with a prickly surface.

*DISCLAIMER: it is not difficult to germinate and grow Purple Milkweed to a juvenile plant, but getting it to last more than one season, bloom, and set seeds can be a challenge. Often times, you will get a bloom the second growing season IF the first year plant gets to a foot or more. Due to the finicky nature of this species, we cannot offer replacements or refunds on seed or plant purchases.

Live Plant Shipping Table

Spring Fall Age/Size
Potted 3-Packs May/June September 2.5" wide x 3.5" deep pots

Asclepias purpurascens - Purple Milkweed

Map Key

Present in state
Present but introduced in county
Present and native in county; not rare
Not present in state
Present and native in county; rare
Species extirpated (historic)
State or county listed as noxious
Present in state; exotic

This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.

2 Questions asked on Asclepias purpurascens

Since the seeds are so scarce, why don't you offer these as plants?
Hi Nathan, We grow all of our live plants from seed to conserve genetic diversity! Due to this plant's conservative nature, we think it is best to grow in situ, rather than stressing it out with shipping and transplanting.
Hi! If I plant this near other milkweed varieties (especially common milkweed) is there a chance of hybridization? Thanks
Good question, Megan. Purple Milkweed usually blooms earlier than many other Milkweeds, but if the first batch of flowers are not fertilized, this species will often set out a second bloom later in the season; this would be the point when there is a greater chance of hybridization, especially if there are other Milkweed species nearby.

Seed

Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.

Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.

Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.

To learn more, read our BLOG: How to Germinate Native Seeds

Dormant Bare Root Plants

We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.

Download: Installing Your Bare-Root Plants

Potted Plants

3-packs and trays of 32, 38, or 50 plants leave our Midwest greenhouses based on species readiness (being well-rooted for transit) and order date; Spring shipping is typically early May through June, and Fall shipping is mid-August through September. Potted 3-packs and trays of 38 plugs are started from seed in the winter so are typically 3-4 months old when they ship. Trays of 32/50 plugs are usually overwintered so are 1 year old. Plant tray cells are approximately 2” wide x 5” deep in the trays of 38 and 50, and 2.5" wide x 3.5" deep in the 3-packs and trays of 32; ideal for deep-rooted natives. Full-color tags and planting & care instructions are included with each order.

Download: Planting and Care of Potted Plants

*PLEASE NOTE: we are a mail order nursery and have no retail facilities, but you may pick up your order if prior arrangements are made. Pick up orders are subject to **MN Sales Tax.

Shipping & Handling Charges

SEED $100.00 and under: $5.00
Retail SEED orders over $100.00 ship free!

Custom seed mixes or discounted seed sales over $100, add 5% of the total seed cost
(for orders over $1,000 a package signature may be required)

BARE ROOT and POTTED PLANTS $50.00 and under: $9.00
over $50.00: 18% of the total plant cost. (For orders over $1,000 a package signature may be required.)

TOOLS and BOOKS have the shipping fee included in the cost of the product (within the contiguous US).

**We are required to collect state sales tax in certain states. Your state's eligibility and % will be calculated at checkout. MN State Sales Tax of 7.375% is applied for orders picked up at our MN location. Shipping & handling charges are also subject to the sales tax.

Shipping Season

SEED, TOOLS and BOOKS are sent year-round. Most orders ship within 1-3 business days.

BARE ROOT PLANTS are shipped during optimal transplanting time: Spring (April-May) and Fall (Oct). Some ephemeral species are also available for summer shipping. Since our plants are field-grown, Nature sets the schedule each year as to when our season will begin and end. We fill all orders, on a first-come, first-serve basis, to the best of our ability depending on weather conditions beyond our control.

POTTED PLANTS (Trays of 32/38/50 plugs and 3-packs) typically begin shipping early May and go into June; shipping time is heavily dependent on all the species in your order being well-rooted. If winter-spring greenhouse growing conditions are favorable and all species are well-rooted at once, then we ship by order date (first come, first serve). We are a Midwest greenhouse, and due to the challenges of getting all the species in the Mix & Match and Pre-Designed Garden Kits transit-ready at the same time, we typically can't ship before early May. Earlier shipment requests will be considered on a case-by-case basis.

*We are unable to ship PLANTS (bare root or potted) outside the contiguous US or to CALIFORNIA due to regulations.

Delivery

We ship using USPS, UPS and Spee Dee. UPS and Spee Dee are often used for expediting plant orders; they will not deliver to Post Office Box numbers, so please also include your street address if ordering plants. We send tracking numbers to your email address so please include it when you order.

FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.

Details

Seeds/Packet
20
Seeds/Ounce
4,000
Germination Code
C(30)
Life Cycle
Perennial
Sun Exposure
Full, Partial
Soil Moisture
Medium-Wet, Medium, Medium-Dry
Height
3 feet
Bloom Time
June, July
Bloom Color
Purple
Advantages
Pollinator Favorite: butterflies, moths, bees, wasps, beetles
Deer Resistant
Highly recommended for home landscaping
USDA Zones
4-9
Plant Spacing
18-24"
Catalog Code
ASC09F