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Browallia speciosa Browallia, Amethyst Flower1

Edward F. Gilman and Teresa Howe 2


Browallia produces blue or white flowers over a long period of time (Fig. 1). The plant prefers afternoon shade and has a height of one to one and a half feet. Over fertilization causes leaf growth at the expense of flower production. Browallia is suitable for hanging pots.

Figure 1. Browallia.
Figure 1.  Browallia.

General Information

Scientific name: Browallia speciosa
Pronunciation: bro-WAL-ee-uh spee-see-O-suh
Common name(s): browallia, amethyst flower
Family: Solanaceae
Plant type: annual
USDA hardiness zones: all zones (Fig. 2)
Planting month for zone 7: Jun
Planting month for zone 8: May
Planting month for zone 9: Apr
Planting month for zone 10 and 11: Mar; Sep; Oct; Nov
Origin: not native to North America
Uses: mass planting; container or above-ground planter; cut flowers; cascading down a wall
Availability: grown in small quantities by a small number of nurseries
Figure 2. Shaded area represents potential planting range.
Figure 2.  Shaded area represents potential planting range.


Height: 1 to 2 feet
Spread: 1 to 2 feet
Plant habit: round
Plant density: moderate
Growth rate: moderate
Texture: medium


Leaf arrangement: opposite/subopposite
Leaf type: simple
Leaf margin: entire
Leaf shape: ovate
Leaf venation: pinnate
Leaf type and persistence: not applicable
Leaf blade length: 2 to 4 inches
Leaf color: green
Fall color: not applicable
Fall characteristic: not applicable


Flower color: blue; purple
Flower characteristic: showy


Fruit shape: no fruit
Fruit length: no fruit
Fruit cover: no fruit
Fruit color: not applicable
Fruit characteristic: inconspicuous and not showy

Trunk and Branches

Trunk/bark/branches: not applicable
Current year stem/twig color: green
Current year stem/twig thickness: medium


Light requirement: plant grows in part shade/part sun
Soil tolerances: clay; sand; acidic; loam
Drought tolerance:
Soil salt tolerances: unknown
Plant spacing: 6 to 12 inches


Roots: not applicable
Winter interest: not applicable
Outstanding plant: not particularly outstanding
Invasive potential: not known to be invasive
Pest resistance: long-term health usually not affected by pests

Use and Management

The seed germinates in two to three weeks at temperatures of 75°F. Do not cover the seed with soil. The plants can be pinched to encourage bushiness. Browallia needs to be hardened off before planting outside. In USDA hardiness zones 10 and 11, plant in the fall for winter bloom.


1. This document is FPS75, one of a series of the Environmental Horticulture Department, UF/IFAS Extension. Original publication date October 1999. Reviewed February 2014. Visit the EDIS website at
2. Edward F. Gilman, professor, Environmental Horticulture Department; and Teresa Howe, coordinator, Research Programs/Services, Gulf Coast Research and Education Center, UF/IFAS Extension, Gainesville, FL 32611.

Publication #FPS75

Date: 5/7/2015

      Organism ID


      • Gail Hansen de Chapman