Swamp Rose Mallow (Hibiscus) vs Sulphur-Flower Buckwheat - TreeTime.ca

Swamp Rose Mallow (Hibiscus) vs Sulphur-Flower Buckwheat

Hibiscus moscheutos

Eriogonum umbellatum

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Swamp Rose Mallow (Hibiscus)
Sulphur-Flower Buckwheat

Swamp Rose Mallow (Hibiscus) has large white-pink showy flowers which attract hummingbirds and pollinators to your yard. It is a tall, fast growing perennial shrub. The flowers typically only last 1-2 days, but the plant will continue to rebloom throughout the season.

This hibiscus tolerates heat and humidity but does not do well when exposed to wind. Make sure the plant has access to lots of moisture for better flowering.

The Swamp Rose Mallow (Hibiscus) is also known as the dinner plate hibiscus because it can grow incredibly large flowers, as big as dinner plates.

Sulphur-Flower Buckwheat is a native perennial wildflower known for its dense clusters of cream to yellow flowers. The long-lasting blooms persist from late spring into summer, providing an extended nectar source for a variety of pollinators. The flower buds are often red-tinted before opening. As the blooms age, they shift to orange or red, adding seasonal interest and making them well-suited to dried flower arrangements. Its seeds are also eaten by birds, adding to its ecological value.

Depending on climate and conditions, Sulphur-Flower Buckwheat may be evergreen to semi-evergreen, or its foliage may turn red during fall. Its deep roots and spreading growth stabilize rocky or sandy soils, making it useful for erosion control. Exceptionally hardy once established, it requires little care and thrives in challenging environments, making it an excellent choice for pollinator gardens, naturalization, and ecological restoration projects.

Swamp Rose Mallow (Hibiscus) Quick Facts

Sulphur-Flower Buckwheat Quick Facts

Zone: 5a
Zone: 3a
Height: 1.5 m (5 ft)
Height: 0.2 m (0.5 ft)
Spread: 0.9 m (3 ft)
Spread: 0.5 m (1.5 ft)
Light: full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: fast
Growth rate: medium
Life span: short
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - low
Suckering: low


Foliage: leathery
Fall colour: reddish bronze
Flowers: pink-red
Flowers: colour varies, typically white to yellow
Bloom time: mid spring to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: ON
Native to: AB, BC
Other Names: crimson-eyed rose-mallow, dinner plate hibiscus, eastern rosemallow, hardy hibiscus, marsh mallow, marshmallow hibiscus, sea hollyhock, swamp mallow, swamp rose hibiscus
Other Names: sulphur buckwheat, sulphur flower, wild buckwheat