Primley Blue Mallow
Malva sylvestris 'Primley Blue'
Primley Blue Mallow flowers
(Photo courtesy of NetPS Plant Finder)
Height: 3 feet
Spread: 24 inches
Hardiness Zone: 4a
Other Names: Tree Mallow
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
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.
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;
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. 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!
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.