General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 10 - 16 feet
Plant Spread: 2 - 3 feet
Leaves: Deciduous
Flowers: Showy
Blooms on new wood
Other: Continuous bloom or rebloomer
Flower Color: Bi-Color: Purple with a red center
Flower Time: Summer
Late summer or early fall
Uses: Windbreak or Hedge
Wildlife Attractant: Bees
Resistances: Deer Resistant
Drought tolerant
Propagation: Seeds: Sow in situ
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Cuttings: Cane
Pollinators: Various insects
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Patent/Plant Breeders' Rights: USPP 25,568; Can PBRAF

Trade name information:
Trade Name: Purple Pillar™
Cultivar name: 'Gandini Santiago'
Common names
  • Rose of Sharon
  • Hibiscus
  • Althea

Photo Gallery
Location: springfield MO
Date: 2018-09-19
Location: All pictures taken in/on my gardens/greenhouse/property
Date: 2019-09-01
Location: Toronto, Ontario
Date: 2021-07-21
Rose of Sharon (Hibiscus syriacus Purple Pillar™).

Date: 2021-07-21
Location: springfield MO
Date: 2018-09-17
Location: West Jordan, Utah, United States
Date: 2021-10-05
Location: springfield MO
Date: 2018-09-17
As teh bloom ages it turns a blue color
Location: Salt Lake City, Utah, United States
Date: 2019-07-16
Location: Sooner Plant Farm in Oklahoma
Date: 2017-05-29
Image Property of

Photo Courtesy of Secret Garden Growers.
  • Uploaded by Joy

Photo courtesy of Proven Winners
  • Uploaded by Joy
Location: Clinton, Michigan 49236
Date: 2018-04-03
"Hibiscus syriacus Purple Pillar® 'Gandini Santiago', 2018 photo

Photo courtesy of Proven Winners
  • Uploaded by Joy

Photo courtesy of Proven Winners
  • Uploaded by Joy
  • Posted by frankrichards16 (Clinton, Michigan - Zone 5b) on Mar 7, 2018 11:19 AM concerning plant:
    Hibiscus syriacus Purple Pillar® 'Gandini Santiago' was developed in the Netherlands (PP25568, 2015). Its claim to fame is that it has a pyramidal plant habit (2-3 ft. wide and 10-16 ft. tall). The flowers are pinkish violet with a large red-purple eye. The initial blooms are double while later blooms are single. It is a Proven Winners© selection.

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