Black-Eyed Susan vs Showy Milkweed - TreeTime.ca

Black-Eyed Susan vs Showy Milkweed

Rudbeckia hirta

Asclepias speciosa

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Black-Eyed Susan
Showy Milkweed

Black-Eyed Susan is a striking native wildflower known for its bright yellow, daisy-like flowers with dark center disks. With deadheading, the plant can bloom for an extended period, from mid-summer to early fall. These cheerful flowers attract a variety of pollinators, including bees and butterflies. Adding to its ecological value, the plant also acts as a host for the Wavy-Lined Emerald Moth (Synchlora aerata) and the Silvery Checkerspot (Chlosyne nycteis) butterfly.

While it is typically a short-lived perennial or biennial, the plant freely self-seeds. This allows it to persist in the landscape, particularly in natural areas where it can spread and establish itself. This plant is drought-tolerant, salt-tolerant, and deer and rabbit-resistant, making it ideal for challenging environments. The Black-Eyed Susan is well suited to wildflower gardens, pollinator gardens, as well as slopes, banks, and naturalized areas.

Showy Milkweed is a native perennial wildflower known for its fragrant clusters of pink to purple, star-shaped flowers. It is an essential plant for Monarch butterflies, acting as a critical host plant for caterpillars and a nectar source for adults. Blooming from early to mid-summer, these flowers also supply nectar to many other pollinators, including bees, butterflies, moths, and hummingbirds.

Ideal for butterfly conservation, pollinator gardens, and naturalization projects, Showy Milkweed thrives in a wide range of soils, including dry and rocky ground. While it spreads via underground rhizomes to form colonies, it is much less aggressive than Common Milkweed (Asclepias syriaca).

Note: All parts of the plant contain toxic cardiac glycosides, especially the milky sap. Do not ingest any part of the plant and prevent sap from contacting skin or eyes. Toxic to humans, pets, and livestock.

Black-Eyed Susan Quick Facts

Showy Milkweed Quick Facts

Zone: 3a
Zone: 3a
Height: 0.8 m (2.5 ft)
Height: 0.9 m (3 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.5 m (1.5 ft)
Light: full sun
Light: full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: very fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright, clump forming
Spreading: rhizomes - high, seeds - high
Suckering: none
Maintenance: medium
Maintenance: medium


Toxicity: toxic to pets, livestock, and humans if ingested, can cause skin and eye irritation.
Flowers: bright yellow; daisy-like
Flowers: purplish-pink clusters
Bloom time: early summer to fall
Bloom time: early to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: SK, MB, ON
Native to: AB, BC, MB, YT
Other Names: hairy coneflower