Annabelle Hydrangea vs Yellow Hedysarum - TreeTime.ca

Annabelle Hydrangea vs Yellow Hedysarum

Hydrangea arborescens Annabelle

Hedysarum sulphurescens

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(new stock expected: fall of 2025)

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Annabelle Hydrangea
Yellow Hedysarum

Annabelle Hydrangea is a cold hardy shrub that is well known for its large, compact clusters of white flowers. Unlike other flowering species, Hydrangeas do best in partial shade. However, they are capable of growing in full sun if the soil is kept consistently moist.

Blooms occur on new wood, so regular pruning is encouraged in late winter. Try Annabelle Hydrangea as a border or on its own.

Yellow Hedysarum is a native perennial wildflower recognised for its clusters of bright yellow pea-like blooms. It adds colour to grasslands, roadsides, and open woods. It is also a nitrogen fixer, which helps improve soil fertility. Because of its deep root system, it contributes to slope and soil stabilisation.

The plant provides forage for wildlife and cover for small animals, especially its roots. Its flowers attract pollinators such as bees.

Yellow Hedysarum plays an important role in prairie and foothill ecosystems. It is well-suited for ecological restoration, naturalisation, pollinator gardens, and erosion control projects.

Annabelle Hydrangea Quick Facts

Yellow Hedysarum Quick Facts

Zone: 3a
Zone: 2b
Height: 1.2 m (4 ft)
Height: 0.5 m (1.5 ft)
Spread: 1.5 m (5 ft)
Spread: 0.2 m (0.8 ft)
Light: partial shade
Light: partial shade, full sun
Moisture: normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: short
Growth form: ascending to upright
Spreading: seeds - low
Suckering: medium


Flowers: white, showy clusters
Flowers: creamy yellow, in dense spikes
Bloom time: late spring to summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Other Names: sulphur hedysarum, sulphur sweet-vetch, yellow sweet-vetch