Black-Eyed Susan vs Round-Leaved Sundew - TreeTime.ca

Black-Eyed Susan vs Round-Leaved Sundew

Rudbeckia hirta

Drosera rotundifolia

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Black-Eyed Susan
Round-Leaved Sundew

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

As a perennial, it dies back to the crown each winter, it will regrow from the base in the spring. Avoid disturbing the crown during late winter to ensure healthy growth the following season.

Round-Leaved Sundew is a native carnivorous plant, easily recognized by its bright green leaves covered in distinctive red, glandular hairs. These hairs secrete a sticky substance that is used to attract, trap, and digest insects. Their carnivorous nature allows them to survive in nutrient-poor, acidic soils where many other plants may struggle to grow.
They produce small white flowers that grow along the top of a slender, leafless stem. They can be found growing in wetlands, most often among sphagnum moss, in consistently moist, acidic soils. It does best in cooler summer climates and is intolerant of shade. Due to its small size, the plant can be difficult to spot in its natural habitat. Round-Leaved Sundew is an indicator of healthy wetland systems and is valued in ecological restoration and conservation projects.

Black-Eyed Susan Quick Facts

Round-Leaved Sundew Quick Facts

Zone: 3a
Zone: 3a
Height: 0.8 m (2.5 ft)
Height: 0.1 m (0.2 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.1 m (0.4 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: wet
Growth rate: very fast
Growth rate: slow
Life span: short
Life span: short
Growth form: rosette-forming
Spreading: axillary bud plantlets - medium, seeds - low
Suckering: none
Maintenance: medium


Foliage: round, green with sticky red tentacles
Fall colour: red to marooon
Flowers: bright yellow; daisy-like
Flowers: tiny white flowers on long leafless stem
Bloom time: early summer to fall
Bloom time: summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: SK, MB, ON
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: hairy coneflower
Other Names: roundleaf sundew