Canada Red Rhubarb vs Nodding Onion - TreeTime.ca

Canada Red Rhubarb vs Nodding Onion

Allium cernuum

Rheum rhabarbarum Canada Red

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Nodding Onion
Canada Red Rhubarb

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.

The Canada Red Rhubarb is a perennial vegetable grown primarily for its sweet-tart edible leaf stalks that are commonly used in jams, sauces and pies. This plant develops from a short crown, growing thick stems with large heart-shaped leaves that retain their green color throughout the season. In summer, white flowers appear above the green foliage.

The Canada Red Rhubarb typically grows shorter, more slender stalks that feature a striking red color with a sweeter flavor than other cultivars. For a more reliable crop, it is recommended not to harvest the Canada Red Rhubarb in its first year of growth to allow its root system to establish.

Nodding Onion Quick Facts

Canada Red Rhubarb Quick Facts

Zone: 3a
Zone: 3a
Height: 0.3 m (1.0 ft)
Height: 0.9 m (3 ft)
Spread: 0.2 m (0.5 ft)
Spread: 0.9 m (3 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - high
Suckering: low
Maintenance: medium
Maintenance: medium

Toxicity: raw leaves and bulbs can be midly toxic

Toxicity: leaves are highly toxic (oxalic acid)
Foliage: smells of onion when crushed, edible
Flowers: white, pink, or purple nodding clusters
Flowers: white
Bloom time: late spring to summer
Fruit: edible leaf stalks
Flavor: sweet, tart
Harvest: August/September
Hybrid: no
Hybrid: yes
Catkins: no
Catkins: no


Native to: AB, BC, SK, ON
Other Names: ladys leek, nodding wild onion