Annual
Amethyst Flower
Browallia speciosa
Proven Winners® varieties
Varieties We Carry
Endless FlirtationBrowallia speciosaEndless Illumination PWBrowallia speciosa
Sizes & Pricing
1 galProven WinnersFrom$7.95
Fresh this week. Last restocked Jun 25.
LightPart Sun, Part Shade
WaterModerate
Mature size1-1.5 feet × 1-1.5 feet
About Amethyst Flower
Amethyst Flower (Browallia speciosa) is a South American annual producing star-shaped blooms in vivid violet-blue and white, valued for its performance in shade where few flowering annuals excel. Its bushy, compact form suits hanging baskets, windowboxes, and shaded container gardens. Starting at $7.95.
Plant details
- Bloom Season
- Spring, Summer, Fall
- Flower Color
- White, Purple, Blue
- Growth Rate
- Moderate
- Foliage
- Evergreen
- Soil
- Sandy, Loam, Well-drained
Best planting months
Recommended forZone 9b · St. Augustine, FL
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Seasonal care
Bloom season. New foliage emerges. Good planting window.
Bloom season.
Bloom season. Foliage may begin to change or drop. Ideal planting window.
Dormant — drops foliage.
Care essentials
Light
Amethyst Flower thrives in partial shade and tolerates full shade in NE Florida — one of few flowering annuals that performs reliably where sunlight is limited. Protect from harsh afternoon sun to prevent leaf scorch and extend bloom.
Water
Keep soil evenly moist but well-drained; avoid overwatering, which reduces flowering and encourages foliage at the expense of blooms. In NE Florida's warm season, check soil moisture every 2–3 days and water when the top inch is dry.
Soil & Fertilizer
Plant in well-drained sandy or loamy soil amended with compost to retain some moisture. Apply a balanced slow-release fertilizer at planting; avoid excess nitrogen. In containers, feed with a diluted balanced liquid fertilizer every 4–6 weeks during the growing season.
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Common questions
Is Amethyst Flower a good plant for St. Augustine?
Amethyst Flower is a annual for Zone 9b coastal Florida gardens, reaching 1-1.5 feet × 1-1.5 feet.
Care information verified from
Last reviewed February 2026. Our care guidance comes from trusted horticulture sources and decades of helping St. Augustine gardeners. Conditions here can vary dramatically from one area to the next, so come ask us and we'll tailor it to your yard.