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perennial

Purple Berkheya

Berkheya purpurea

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Purple Berkheya (Berkheya purpurea) at A Very Successful Garden Center

Purple Berkheya flowers

Purple Berkheya flowers

(Photo courtesy of NetPS Plant Finder)

Plant Height:  18 inches

Flower Height:  24 inches

Spread:  18 inches

Sunlight:  full sun 

Hardiness Zone:  5b

Description:

A prickly thistle that suprisingly turns into a beautiful perennial when the flowers emerge in summer and persist until fall; wear gloves, the narrow wavy foliage is hairy and very spiny; stunning purple to white blooms are like small sunflowers

Ornamental Features

Purple Berkheya features bold spikes of purple daisy flowers with white overtones rising above the foliage from early summer to mid fall. Its attractive spiny narrow leaves remain grayish green in color throughout the season.

Landscape Attributes

Purple Berkheya is an herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This is a relatively low maintenance plant. Trim off the flower heads after they fade and die to encourage more blooms late into the season. It is a good choice for attracting bees and 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.

Purple Berkheya is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • Rock/Alpine Gardens
  • General Garden Use
  • Container Planting

Planting & Growing

Purple Berkheya will grow to be about 18 inches tall at maturity extending to 24 inches tall with the flowers, with a spread of 18 inches. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a fast 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!

This plant should only be grown in full sunlight. It prefers dry to average moisture levels with very well-drained soil, and will often die in standing water. It is considered to be drought-tolerant, and thus makes an ideal choice for a low-water garden or xeriscape application. 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. This species is not originally from North America.

Purple Berkheya is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. With its upright habit of growth, it is best suited for use as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. 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
Accent  Massing  Rock  Garden  Container 
Applications
Flowers  Foliage Color  Attracts Wildlife 
Ornamental Features