Overview

Ascelpias verticillata is a perennial herb in the genus Asclepias, part of the Apocynaceae family. Ascelpias verticillata grows best in full sun, and tolerates well-drained and sandy or rocky soils soils. Suggested uses include wildlife gardens, naturalized areas and pollinator gardens. It is native to Manitoba, Ontario and Saskatchewan.

About

Ascelpias verticillata is a taxon in the genus Asclepias within the Apocynaceae family. It flowers from July to September. Gardeners should consult supplier or botanical notes for details of habit and cultivation, as requirements can vary between plants labelled under a single botanical name. Plan for the summer flowering period when siting the plant in the garden.

About the genus

Asclepias is a genus of herbaceous, perennial, flowering plants known as milkweeds, named for their latex, a milky substance containing cardiac glycosides termed cardenolides, exuded where cells are damaged. Most species are toxic to humans and many other species, primarily due to the presence of cardenolides. However, as with many such plants, some species feed upon milkweed leaves or the nectar from their flowers.

Wikipedia contributors, "Asclepias", CC BY-SA 4.0 — Asclepias

In the garden

Ascelpias verticillata belongs to the genus Asclepias and sits within the Apocynaceae family; the name identifies its botanical placement rather than cultivation specifics. The species produces its flowers from July to September, so the main seasonal interest is concentrated in mid to late summer. Exact appearance, height and cultural needs can differ between accessions, so check the plant label or supplier description before final placement. When preparing to add Ascelpias verticillata to a planting scheme, use the supplier’s notes and reputable nursery descriptions to confirm soil preference, exposure and hardiness for the stock you have. If provenance or cultivar information is absent, observe the plant closely in the first season to learn its vigour and flowering timing; amend position or soil conditions in year two based on that evidence. Siting should reflect the July–September flowering window: position where blooms will be visible from a path, seating area or window and plan neighbouring plants so they do not outgrow the display during summer. For ongoing management, retain the supplier’s guidance on pruning, cutting back or any seasonal care; the flowering months provide the clearest cue for when Ascelpias verticillata contributes to the garden calendar.

Growing conditions

Best soil and position for Asclepias

Sunlight

full sun

Soil type

well-drained, sandy or rocky soils

Soil moisture

dry to medium

Plant details

Ascelpias verticillata size, habit and characteristics

Plant type

perennial herb

Suggested uses

wildlife gardens, naturalized areas, pollinator gardens

Native to

Manitoba, Ontario, Saskatchewan

Toxicity

toxic if ingested

Care notes

Pruning and caring for Ascelpias verticillata

Cultivation

Prefers dry, well-drained soils; drought tolerant once established; avoid overwatering

Pruning

Cut back in late winter or early spring to encourage fresh growth

Propagation

seed, division

Frequently asked questions