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Primley Blue Mallow

Malva sylvestris 'Primley Blue'

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Primley Blue Mallow (Malva sylvestris 'Primley Blue') at The Barn Nursery and Landscape Center

Primley Blue Mallow flowers

Primley Blue Mallow flowers

(Photo courtesy of NetPS Plant Finder)

Height:  3 feet

Spread:  24 inches

Sunlight:  full sun 

Hardiness Zone:  4

Other Names:  Tree Mallow

Description:

An excellent variety for season long color, this striking mallow displays powder blue, violet veined blooms from early summer until early fall; a tough adaptable plant that is sure to please

Ornamental Features

Primley Blue Mallow features bold spikes of blue round flowers with purple veins rising above the foliage from early summer to late fall, which emerge from distinctive purple flower buds. The flowers are excellent for cutting. Its crinkled round leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Primley Blue Mallow is an herbaceous perennial with a rigidly upright and towering form. Its relatively coarse texture can be used to stand it apart from other garden plants with finer foliage.

This plant will require occasional maintenance and upkeep, and should be cut back in late fall in preparation for winter. It is a good choice for attracting butterflies and hummingbirds to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Self-Seeding

Primley Blue Mallow is recommended for the following landscape applications;

  • Mass Planting
  • General Garden Use
  • Naturalizing And Woodland Gardens

Planting & Growing

Primley Blue Mallow will grow to be about 30 inches tall at maturity, with a spread of 24 inches. It tends to be leggy, with a typical clearance of 1 foot from the ground, and should be underplanted with lower-growing perennials. The flower stalks can be weak and so it may require staking in exposed sites or excessively rich soils. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 4 years.

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. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selected variety of a species not originally from North America.

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