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Large White Petunia

Petunia axillaris

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Large White Petunia (Petunia axillaris) at Liberty Landscape Supply

Large White Petunia flowers

Large White Petunia flowers

(Photo courtesy of NetPS Plant Finder)

Height:  24 inches

Spacing:  20 inches

Sunlight:  full sun 

Hardiness Zone:  (annual)

Other Names:  Wild White Petunia, White Moon Petunia

Description:

An original ancestor of modern petunias, from which hybrids are developed; releases a lovely vanilla-licorice scent at night; a large mounded growth habit

Ornamental Features

Large White Petunia is bathed in stunning fragrant white trumpet-shaped flowers with buttery yellow throats at the ends of the stems from mid spring to mid fall. Its pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Large White Petunia is a dense herbaceous annual with a mounded form. 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 plant will require occasional maintenance and upkeep. 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 hummingbirds 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.

Large White Petunia is recommended for the following landscape applications;

  • Mass Planting
  • Border Edging
  • General Garden Use
  • Container Planting
  • Hanging Baskets

Planting & Growing

Large White Petunia will grow to be about 24 inches tall at maturity, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 20 inches apart. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. This fast-growing annual will normally live for one full growing season, needing replacement the following year.

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 species is not originally from North America. It can be propagated by cuttings.

Large White Petunia is a fine choice for the garden, but it is also a good selection for planting in outdoor containers and hanging baskets. It can be used either as 'filler' or as a 'thriller' in the 'spiller-thriller-filler' container combination, depending on the height and form of the other plants used in the container planting. 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  Edging  Garden  Container  Basket 
Applications
Flowers  Attracts Wildlife 
Ornamental Features