Purple Pillar Hibiscus

Growing it in South Louisiana.

Purple Pillar® rose of Sharon is Hibiscus syriacus ‘Gandini Santiago’, a deciduous shrub with a naturally columnar shape. Expect approximately 10–16 ft tall and 4–5 ft wide in USDA zones 5–9. Purple, semi-double flowers with a contrasting dark red eye appear in summer through fall. Give it at least six hours of sun and soil that drains well. Low once established; water deeply during prolonged dry spells. Water regularly while establishing and monitor container plants more frequently. For Southeast Louisiana, avoid low spots that stay saturated after heavy rain; mulch without covering the crown. Pruning is usually minimal; if needed, prune in early spring before flowering on new growth. Allow time for spring leaf-out. Its flowers attract bees, butterflies, and hummingbirds, and its slim outline offers seasonal screening without the footprint of a spreading shrub.

Botanical name

Hibiscus syriacus 'Gandini Santiago' (Purple Pillar®)

USDA hardiness zones

5–9

Mature height

10–16 ft

Mature width

4–5 ft

Sun requirements

Full sun — at least 6 hours

Bloom color

Purple

Bloom season

Summer through fall

Foliage

Deciduous

Growth rate

Upright, narrow column

Water requirements

Low once established; water deeply during prolonged dry spells

Pollinator / wildlife value

Flowers attract bees, butterflies, and hummingbirds

Landscape uses

Privacy, Pollinators, Flowering screen, Specimen planting, Narrow border, Large patio container

Container size

3 gallon

Mature dimensions are approximate and vary with growing conditions and cultivar. Confirm the exact selection before purchase.

Growing references: Proven Winners — Purple Pillar cultivar specifications