Light Needs
Mature Height
Mature Spread
Growing Zones
Looking for a standout plant in the garden? Purple Pillar Rose of Sharon is it! For those of you with limited space or looking for a focal point in the garden or a screening plant, Purple Pillar will fill your need! Imagine having a plant commanding the center of attention in the garden.
While the name Purple Pillar describes exactly what the plant does in the garden, the botanical name of Hibiscus syriacus ‘Gandini Santiago’ gives it an air of romantic mystery. A plant that will sweep you off your feet so to speak. With its purple flowers with deep splashes of red a buzz with pollinators, it will be the focal point in your garden. Even in the winter when it loses its leaves, Purple Pillar will still add a design element to the garden.
Purple Pillar Rose of Sharon Care
Purple Pillar blooms from summer all the way into fall and will do best with just average water and soil when planted in full sun. It is hardy from Zone 5a-9b which means it will grow almost anywhere in the country! Pruning is minimal so it is pretty much a carefree plant.
Purple Pillar Rose of Sharon Spacing
Purple Pillar is a tall plant, growing 10-16 ft. high and just 2-3 ft. wide! This is a plant that is not only a great focal point in the garden, it is a fabulous hedge to surround the garden or as a screen to provide some privacy to the home. It can be used in a container as the thriller or used in mass plantings as well, creating its own pollinator haven.
Interesting Fact - The flowers on Purple Pillar rose of Sharon are semi-double, which means that they have two or more layers of petals, but that the stamens and pistil are still visible in the center.
Purple Pillar® Rose of Sharon Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 to 9 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Full Sun (6+ Hours Direct Sun)
- Mature Height
- 10-16 Feet
- Mature Spread
- 2-3 Feet
- Growth Habit
- , Upright, Columnar
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Purple
- Flower Description
- Purple
- Bloom Time
- Summer to Fall
- Blooms On
-
New Wood
?
"Blooms on" tells you which stems produce flowers, which decides when it's safe to prune.
- New Wood: Flowers form on stems that grow this season. Prune in late winter or early spring without losing blooms.
- Old Wood: Flower buds form on last year's stems. Prune right after flowering. Pruning in fall or early spring removes next year's blooms.
- Both New and Old Wood: Blooms on last year's stems and again on new growth, so it flowers even after a hard winter or a mistimed pruning. Prune lightly after the first flush of blooms.
- When to Prune
- Late winter to early spring, before new growth starts
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Flowering, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Purple Pillar® Rose of Sharon
- Botanical Name
- Hibiscus syriacus 'Gandini Santiago' USPP 25,568
- Brand
- Proven Winners
- Plant Type
- Deciduous
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!