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Plant Finder

perennial

Grape Knee-Hi Lobelia

Lobelia 'Grape Knee-Hi'

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Grape Knee-Hi Lobelia (Lobelia 'Grape Knee-Hi') at Town And Country Gardens

Grape Knee-Hi Lobelia flowers

Grape Knee-Hi Lobelia flowers

(Photo courtesy of NetPS Plant Finder)

Height:  24 inches

Spacing:  15 inches

Sunlight:  partial shade 

Hardiness Zone:  4

Other Names:  Cardinal Flower

Description:

A wonderful sterile dwarf form with true deep purple flowers spikes; excellent in the shade garden or containers; a favorite of hummingbirds, this variety maintains a good form throughout the season and makes an excellent border planting

Ornamental Features

Grape Knee-Hi Lobelia features showy spikes of purple flowers rising above the foliage from early to mid summer. The flowers are excellent for cutting. Its pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Grape Knee-Hi Lobelia 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, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting butterflies and hummingbirds to your yard. It has no significant negative characteristics.

Grape Knee-Hi Lobelia is recommended for the following landscape applications;

  • Mass Planting
  • General Garden Use

Planting & Growing

Grape Knee-Hi Lobelia will grow to be about 20 inches tall at maturity, with a spread of 18 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 15 inches apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 5 years.

This plant should be grown in a location that is shaded from the hot afternoon sun. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil pH, but grows best in rich soils. It is somewhat tolerant of urban pollution. This particular variety is an interspecific hybrid, and parts of it are known to be toxic to humans and animals, so care should be exercised in planting it around children and pets. It can be propagated by division; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

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

Disclaimer - This Plant Finder tool is an online resource representing many of the varieties that we carry over the course of the season, and is intended for informational purposes only. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact the store directly for availability. It does not include our entire inventory of plants, so be sure to visit our store to see varieties that may not be represented on this list.