Asclepias, Butterfly Milkweed, Yellow Butterfly Weed, Pleurisy Root 'Hello Yellow'

Asclepias tuberosa

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: tuberosa (too-ber-OH-suh) (Info)
Cultivar: Hello Yellow



Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun



Foliage Color:

Unknown - Tell us


24-36 in. (60-90 cm)


15-18 in. (38-45 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Where to Grow:

Grow outdoors year-round in hardiness zone


Parts of plant are poisonous if ingested

Bloom Color:

Bright Yellow

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Summer

Late Summer/Early Fall

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Bag seedheads to capture ripening seed

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


This plant is said to grow outdoors in the following regions:

Auburn, Alabama

Los Angeles, California

Lewes, Delaware

Green Cove Springs, Florida

Hollywood, Florida

Venice, Florida

Hahira, Georgia

Villa Rica, Georgia

Peoria, Illinois

Jeffersonville, Indiana

Hebron, Kentucky

Prospect, Kentucky

Baton Rouge, Louisiana

Oxon Hill, Maryland

Florence, Mississippi

Forked River, New Jersey

Fargo, North Dakota

Cincinnati, Ohio

Austin, Texas(2 reports)

Dallas, Texas

Georgetown, Texas

Houston, Texas

Arlington, Virginia

Newport News, Virginia

Springfield, Virginia

Madison, Wisconsin

Marinette, Wisconsin

Pewaukee, Wisconsin

show all

Gardeners' Notes:


On Jun 14, 2020, legalsmith from Baton Rouge, LA wrote:

My experience with this plant in 8b (Baton Rouge, La) is SO DIFFERENT from what else I can find anywhere online. Please reply if yours corresponds. My plant is 5' tall (It feeds plenty of Monarchs) after 3 or 4 years and it is blooming away right now., It also has seed pods that are opening. I've never collected seeds of any kind before, but I scarified and soaked them last night and put them in the fridge with wet paper towels in a ziplock treatment, intending to take them out in 4 weeks to plant. From what I gather, I can start them in small containers, to be quickly transplanted to deep 10 Gal. containers for a year or two. There's no chance of a freeze until November, and I can always move the containers into the garage/workshop area when it does. I'm just confused about whether... read more


On Jan 22, 2013, hymenocallis from Auburn, AL (Zone 8a) wrote:

To get the seeds all you need to do is to get a single follicle ( fruiting structure) of the milkweed when it is about to burst and there will be 50 + seds within and they will provide new plants for the future. All milkweeds produce seeds the same way so you can take the seeds in the summer and plant them in anything and they will come up.. I recommend you store the seeds in a fridge until spring and they will maintain about 90% germination for several years.


On Sep 12, 2011, plantmover from Hampton Roads, VA (Zone 7b) wrote:

Had problems initially with drainage and had to relocate multiple times. Finally found a happy spot at the bottom of a downspout where I added some gravel. The plant has thrived incredibly well since, filling out and blooming multiple times a season. It is much larger and fuller than the native orange variety planted in full sun on a much drier sloped area.


On Jul 26, 2011, boopie2 from Springfield, VA wrote:

I have had this plant for 3 years. I LOVE it..just keeping cutting it back after it blooms and it will rebloom again and again. My only negative is that I have yet been successful at getting it to reseed AND it is very difficult to find at the local nursery. I am happy to report I had a TON of monarchs on this plant last year


On Jun 12, 2010, braun06 from Irving, TX (Zone 8a) wrote:

This plant is tough, but less vigorous than the species. I bought 4" containers last year but they came back less succesful in thier 2nd year in the ground. I have grown the species before and of course had no problems. I will be removing these plants and attempting a different prairie native, Asclepias sullivantii.


On Feb 21, 2010, coachbc from Schaumburg, IL wrote:

do butterfiles prefer the traditional orange butterfly weed to the Hello Yellow?


On May 26, 2007, tabasco from Cincinnati (Anderson Twp), OH (Zone 6a) wrote:

This particular asclepias, a perennial in our zone 6a if planted in a well-draining and sunny spot in the garden, can take three years to bloom from seed planting. A. tuberosa is a favorite butterfly attracting bloom in area gardens for its attractive and neat garden habit and its ability to return each spring (unlike A. currasavica, another attractive garden A. which is not hardy in northern climes).

A. tuberosa is a much visited nectar milkweed of twelve species of butterlies here (according to the University of Kentucky Extension). And if you want the beautiful Monarch butterflies to visit your garden, this Asclepias serves as both a nectar flower and host plant for oviposting (egg laying). Of course, if a monarch mother chooses your A. for her egg laying, the hatc... read more


On Nov 19, 2006, Marilynbeth from Hebron, KY wrote:


Love having it for the color and for the Butterflies!