Purple Prairie Clover vs Nodding Onion - TreeTime.ca

Purple Prairie Clover vs Nodding Onion

Dalea purpurea

Allium cernuum

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Purple Prairie Clover
Nodding Onion

Purple Prairie Clover is a native perennial wildflower known for its striking purple blooms. The flower heads grow as dense spikes on tall stems, with each flower head containing many tiny blossoms. Blooming for 4–6 weeks in the summer, it attracts a variety of pollinators, including bees and butterflies.

The high protein content of the Purple Prairie Clover makes it excellent forage for wildlife and birds like to feed on its seeds. As a nitrogen-fixing plant, it enriches the soil, improving fertility and benefiting nearby vegetation. These ecological contributions make it a great choice for pollinator gardens, prairie & rangeland restoration, naturalization, and re-vegetation efforts.

This drought and heat-tolerant plant thrives in various soil conditions, including rocky soil, making it remarkably easy to grow in challenging environments.

Nodding Onion is a native perennial wildflower known for its nodding clusters of flowers that range in color from white to pink to purple. The lightly scented blooms provide pollen and nectar for pollinators, especially bees, which can collect while hanging upside down, a capability most other insects lack.

The narrow, grass-like leaves of the Nodding Onion can be used as a seasoning in cooked dishes, though bulbs and raw leaves should not be eaten in large quantities. All parts of the plant have an onion-like aroma when bruised, which helps deter deer and rabbits. They can self-seed readily, so removing spent blooms helps manage their spread. Tolerant of a range of soils, including alkaline, it is well-suited for a variety of plantings, including pollinator gardens and naturalization projects.

Purple Prairie Clover Quick Facts

Nodding Onion Quick Facts

Zone: 3a
Zone: 3a
Height: 0.6 m (2.0 ft)
Height: 0.3 m (1.0 ft)
Spread: 0.3 m (1.0 ft)
Spread: 0.2 m (0.5 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: very fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - high
Suckering: none
Maintenance: medium


Toxicity: raw leaves and bulbs can be midly toxic
Foliage: smells of onion when crushed, edible
Flowers: purple flowers in dense cone-like heads
Flowers: white, pink, or purple nodding clusters
Bloom time: mid summer
Bloom time: late spring to summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, SK, MB, ON
Native to: AB, BC, SK, ON
Other Names: violet prairie-clover
Other Names: ladys leek, nodding wild onion