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Purple Robe Cupflower

Nierembergia scoparia 'Purple Robe'

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Purple Robe Cupflower (Nierembergia scoparia 'Purple Robe') at Ashcombe Farm & Greenhouses

Nierembergia scoparia 'Purple Robe' flowers

Nierembergia scoparia 'Purple Robe' flowers

(Photo courtesy of NetPS Plant Finder)

Height:  8 inches

Spacing:  8 inches

Sunlight:  full sun 

Hardiness Zone:  (annual)

Description:

A fast growing variety that forms a nice carpet of violet-blue blooms all summer; cascades nicely over rocks and walls, and is a nice filler for mixed containers; exhibits good heat tolerance, but does need regular watering

Ornamental Features

Purple Robe Cupflower has masses of beautiful violet cup-shaped flowers with blue overtones and buttery yellow eyes at the ends of the stems from early summer to early fall, which are most effective when planted in groupings. Its small narrow leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Purple Robe Cupflower is a dense herbaceous annual with a mounded form. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This plant will require occasional maintenance and upkeep, and should not require much pruning, except when necessary, such as to remove dieback. It is a good choice for attracting bees and butterflies to your yard. It has no significant negative characteristics.

Purple Robe Cupflower is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • General Garden Use
  • Groundcover
  • Container Planting
  • Hanging Baskets

Planting & Growing

Purple Robe Cupflower will grow to be about 8 inches tall at maturity, with a spread of 12 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 8 inches apart. Its foliage tends to remain low and dense right to the ground. Although it's not a true annual, this fast-growing plant can be expected to behave as an annual in our climate if left outdoors over the winter, usually needing replacement the following year. As such, gardeners should take into consideration that it will perform differently than it would in its native habitat.

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. This is a selected variety of a species not originally from North America. It can be propagated by cuttings; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Purple Robe Cupflower is a fine choice for the garden, but it is also a good selection for planting in outdoor containers and hanging baskets. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the 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  Garden  Groundcover  Container  Basket 
Applications
Flowers  Texture  Attracts Wildlife 
Ornamental Features