Justicia tweediana

Common Name: water willow 
Type: Broadleaf evergreen
Family: Acanthaceae
Native Range: Argentina, Bolivia, Uruguay
Zone: 8 to 10
Height: 2.00 to 3.00 feet
Spread: 2.00 to 3.00 feet
Bloom Time: July to August
Bloom Description: Purple
Sun: Full sun
Water: Dry to medium
Maintenance: Low
Flower: Showy
Leaf: Evergreen
Other: Winter Interest
Tolerate: Drought, Dry Soil


Winter hardy to USDA Zones 8-10 where it is best grown in dry to medium, well-drained soils in full sun.

Noteworthy Characteristics

Justicia tweediana, commonly known as yellow jacobinia, is an evergreen shrub that typically grows to 2-3’ tall and as wide. It is native to Argentina. Showy purple flowers bloom throughout summer.

This species was introduced into commerce in the U.S. by Woodlanders Nursery of Aiken, South Carolina.

Genus name honors James Justice, 18th Century Scottish horticulturist (1698-1763).

Specific epithet honors John Tweedie, 19th century Scotch gardener who emigrated to Argentina.


No serious insect or disease problems.


Beds and borders where winter hardy. Containers. Houseplant.