DetailsPurple Milkweed (Asclepias purpurascens) is a rare and showy Milkweed species. This Mid-western wildflower is a host plant for Monarch populations in the middle portion of the US. A robust grower, Purple Milkweed does well in most any soil and appreciates moisture. Spreading by underground rhizomes, Purple Milkweed is best grown in unused areas of your yard, along ditch banks and fences where it can spread without overrunning other perennials. Good companion plants include Helianthus (perennial Sunflower) and Beebalm (Monarda).
HBLHY21 (Plant - 2.5" deep pot) - Out of stock.
HBLHY51 (Plant - 5" deep pot)
|Common Name||Purple Milkweed|
|Botanical Name||Asclepias purpurascens|
|Zones||3, 4, 5, 6, 7, 8|
|Light Requirements||Full Sun|
|Flower Color||Pink, Purple, White|
|Mature Height||24-36" tall|
|Mature Spread||12-36" wide|
|Bloom Time||Early to mid summer|
|Ships As||Potted Plant|
|Planting Time||Spring / Summer|
|Soil Type||Sandy Soil, Average Soil, Low Fertility Soil, Well-Drained Soil|
|Soil Moisture||Average, Well Draining|
|Amount of Rain||30 to 40"|
|Advantages||Deer Resistant, Attract Butterflies, Bee Friendly, Native, Good for Erosion Control, Low Maintenance, Multiplies / Naturalizes|
|Ideal Region||Coastal California, Northeast, Midwest, Southwest, West, Pacific Northwest|
|Neonicotinoid-Free||Yes - Learn More|
|Ships to Hawaii, Alaska & Canada||No|
Tips For Growing Milkweed/Butterflyweed (Asclepias)
Asclepias (Milkweed) are sun loving plants that are essential perennials for monarch butterflies providing food for caterpillars and nectar for adult butterflies. They bloom from mid-summer into early fall and, with their milky sap, are resistant to rabbits and deer.
Asclepias can be divided into two groups for plant care; Asclepias tuberosa with orange (sometimes yellow) flowers and all the other species with pink (sometimes white) flowers.
1. Asclepias tuberosa (Orange Butterfly Weed) - this perennial stays dormant until later in the spring than many other plants, especially when grown in pots. It's fine to plant dormant plants; don't up-pot them for planting later in the growing season.
2. Asclepias speciosa, A. syriaca. A. incarnata (Milkweed) - these perennial species stay dormant later in the spring than many other plants, especially when they are grown in pots. It's fine to plant dormant plants; don't up-pot them for planting later in the growing season.
Preferred growing conditions:
- Fertilize Asclepias just once in fall with Yum Yum Mix and Planters II. - Naturalized plantings don't need additional fertilization.
- To encourage re-seeding and provide winter interest with their ornamental seed pods, leave the stems intact over the winter. In mid-spring, remove old stems just above ground level.
- All species of Asclepias are late to emerge in the spring, so don't be concerned if other perennials come up first and they remain dormant.
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first.
Most plant and bulb orders arrive within 2-6 days, or less, of leaving our greenhouses in Colorado. This prompt delivery is provided without additional express charges.
Grass Plugs Will ship at planting time in spring, beginning in late February.
Wildflower Seed & Grass Seed Orders ship within 2-3 days.
Standard shipping costs are $4.99 and up, depending on the size of the order.
Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.
Q & A
Suggested Companion Plants:
USDA Hardiness Planting Zones
To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.
- If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
- If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).
Find Your Planting Zone:
Enter your Zip Code to find your USDA Planting Zone