Limelight Hydrangea vs Sulphur-Flower Buckwheat - TreeTime.ca

Limelight Hydrangea vs Sulphur-Flower Buckwheat

Hydrangea paniculata Limelight

Eriogonum umbellatum

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Limelight Hydrangea
Sulphur-Flower Buckwheat

Limelight Hydrangea is a flowering shrub that is known for its green flowers. As they mature, the flower colour changes from a pale green to a creamy white, followed by shades of pink and red. Hydrangea flowers persist longer compared to other flowering shrubs, blooming from late July into fall. They are a popular choice for flower arrangements.

The Limelight Hydrangea can be grown as a stand alone shrub, as a hedge, or incorporated into a flower garden. Blooms occur on new wood, so regular pruning is encouraged in late winter. This is an award winner from the Proven Winners® collection.

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.

Limelight Hydrangea Quick Facts

Sulphur-Flower Buckwheat Quick Facts

Zone: 3a
Zone: 3a
Height: 2.1 m (7 ft)
Height: 0.2 m (0.5 ft)
Spread: 2.1 m (7 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: any
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - low
Suckering: none

Toxicity: toxic to dogs, cats, and horses

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


Native to: AB, BC
Other Names: limelight panicle hydrangea
Other Names: sulphur buckwheat, sulphur flower, wild buckwheat