Plant Database
perennial

Pink Flowering Onion

Allium ostrowskianum

 

 
Pink Flowering Onion (Allium ostrowskianum) at GardenWorks

Pink Flowering Onion flowers

Pink Flowering Onion flowers

(Photo courtesy of NetPS Plant Finder)

Height:  16 inches

Spread:  8 inches

Sunlight:  full sun 

Hardiness Zone:  3a

Other Names:  Flowering Onion

Description:

Lovely rosy-pink flower clusters are front and center of this beautiful ornamental onion; lightly scented flowers and foliage are in bloom from late spring to early summer; a wonderful addition to garden beds, borders and patio containers

Ornamental Features

Pink Flowering Onion has masses of beautiful clusters of rose flowers at the ends of the stems from mid to late spring, which are most effective when planted in groupings. Its fragrant grassy leaves remain green in colour throughout the season.

Landscape Attributes

Pink Flowering Onion is an open herbaceous perennial with an upright spreading habit of growth. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This is a relatively low maintenance plant, and should only be pruned after flowering to avoid removing any of the current season's flowers. It is a good choice for attracting butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.

Pink Flowering Onion is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • Border Edging
  • General Garden Use
  • Container Planting

Planting & Growing

Pink Flowering Onion will grow to be about 16 inches tall at maturity, with a spread of 8 inches. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 5 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen! As this plant tends to go dormant in summer, it is best interplanted with late-season bloomers to hide the dying foliage.

This plant should only be grown in full sunlight. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH, and is able to handle environmental salt. It is highly tolerant of urban pollution and will even thrive in inner city environments. This species is not originally from North America. It can be propagated by multiplication of the underground bulbs.

Pink Flowering Onion is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the larger thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Rock  Edging  Garden  Container 
Applications
Flowers  Texture  Attracts Wildlife 
Ornamental Features


Disclaimer - This resource is provided for informational purposes only and does NOT reflect current availability. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact your favourite GardenWorks location directly for current availability. It does not include our entire inventory of plants, so be sure to visit GardenWorks to see varieties that may not be represented on this list.