Asclepias 'Hello Yellow'

Asclepias 'Hello Yellow': Butterfly Weed Goes Golden

Golden yellow clusters that greet every monarch, bee and hummingbird like old friends at the airport. 'Hello Yellow' is the cheeriest weed you'll ever buy on purpose. WELCOME ABOARD.

Plant Characteristics:

• Botanical Name: Asclepias tuberosa 'Hello Yellow'
• Common Name: Butterfly Weed
• Height: 45–60 cm (18–24 in)
• Spread: 45–60 cm (18–24 in)
• Flowers: Golden yellow, in flat-topped clusters at the stem tips, followed by slim green seed pods with silky seeds
• Bloom Time: Early to late summer (June to August)
• Foliage: Narrow, lance-shaped, green leaves on a clumping, upright plant
• Features: Monarch host plant, good cut flower

Where to Plant: A mid-sized plant for the front or middle of a sunny border, a dry slope, a gravel garden or a pollinator patch. Yellow is easier to blend than orange, so it slips into cool colour schemes as well as hot ones. Leave the seed pods for late-season interest.

Companion Plants: Plant 'Hello Yellow' in a sunny, well-drained bed with pink and lavender to set off the gold. Armeria maritima edges the front with pink pompoms at 15 to 20 cm in May and June. Nepeta Junior Walker™ adds lavender-blue spikes at 30 to 45 cm from June to September. Iris 'Harvest of Memories' opens yellow bearded iris at 95 to 100 cm in June. Sorghastrum nutans rises behind at 90 to 180 cm in flower, a native Indian grass with golden plumes.

Plant Care: Plant in full sun in well-drained soil. Sandy, gravelly or average soil works well. Avoid heavy, soggy clay, which can rot the root. Water through the first season, then only in extended drought. It's slow to emerge in spring, often not appearing until late May or June, so mark where it is. Deadheading the first flowers can encourage a second round. Wear gloves when cutting, because the sap can irritate skin. Butterfly weed grows a deep taproot and resents being moved or divided. Choose a permanent spot. Cut it back in late fall, or in early spring if you leave the pods for winter.

History: Asclepias tuberosa grows wild on dry prairies, open fields and sandy ground across much of eastern and central North America, as far north as southern Ontario, and wild plants are usually orange. 'Hello Yellow' is a yellow-flowered seed strain of the species, and its original breeder isn't documented.

Final Thoughts: Plant it in sun, leave it alone once it settles and watch the caterpillars eat their way to wings. HELLO GORGEOUS, GOODBYE BORING.