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Products > Polygala myrtifolia 'Grandiflora'
 
Polygala myrtifolia 'Grandiflora' - Sweet Pea Shrub

Note: This plant is no longer in stock. This is an archive page preserved for informational use.  
Image of Polygala myrtifolia 'Grandiflora'
 
Habit and Cultural Information
Category: Shrub
Family: Polygalaceae (Milkworts)
Origin: South Africa (Africa)
Evergreen: Yes
Flower Color: Purple
Bloomtime: Year-round
Height: 8-12 feet
Width: 8-12 feet
Exposure: Sun or Shade
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 20-25° F
Polygala myrtifolia 'Grandiflora' (Sweet Pea Shrub) - A large dense evergreen shrub that grows to 10 feet or more tall by an equal spread. The unique rich purple flowers have two winged petals that surround the whitish purple lacy crest. They bloom during most of the year, spring is their peak bloom period. Plant in sun or part shade with regular watering. Polygala myrtifolia is one of the parents of the popular Polygala x dalmaisiana (the other parent is Polygala oppositifolia) from which it differs by being a bigger plant with larger brighter green foliage and larger flowers. The form 'Grandiflora' is reportedly the large flower selection although we have never seen the straight species. The name Polygala is Latin from the Greek word 'polugalon' for "much milk" because of the belief that cows grazing on milkwort increased their milk production. 

The information displayed on this page about Polygala myrtifolia 'Grandiflora' is based on the research we have conducted about it in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about this plant as it grows in the nursery gardens and other gardens visited, as well how the crops of this plant have performed in the containers in our nursery field. We will also incorporate comments that we have received from others and welcome hearing from anyone with information about this plant, particularly if it includes cultural information that will aid others to better grow it.

 
San Marcos Growers, established in 1979, closed for regular business on December 23rd 2025 as the property will be developed for affordable housing.
The gates are closed but we will be open by appointment only as we liquidate remaining plants, supplies and equipment. Our remaining plants are listed on our Live Inventory Page.