How to Grow Sea Star Flower
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Sea Star Flower
Oxalis hirta
flowerSea Star Flower is a tender perennial known for its vibrant, star-shaped blooms in shades of pink, red, orange, or white with distinctive dark centers. The delicate flowers resemble starfish, hence the common name. It produces attractive clover-like foliage and is often grown as a houseplant or tender annual in cooler climates.
When should you plant Sea Star Flower in your zone?
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Example Sea Star Flower timeline · Pittsburgh, PA (Zone 6b)
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Plant Sea Star Flower
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Sea Star Flower blooms
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Sea Star Flower dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10-11; grow as a tender annual or houseplant in cooler zones
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Dormancy/Bulb Rest
2-4 months depending on varietyBulbs are dormant, often with minimal foliage or completely dormant underground
Store in cool, dry location. Reduce watering significantly. Light fertilizer optional in late dormancy
Sprouting & Early Growth
2-3 weeksSmall shoots emerge with delicate clover-like foliage developing from bulbs or seeds
Begin watering as growth appears. Provide bright, indirect light. Start gentle feeding with diluted fertilizer
Vegetative Growth
3-4 weeksDense, attractive green clover-like foliage expands; plant becomes bushier and more robust
Maintain consistent moisture. Provide bright indirect light. Feed every 2-3 weeks with balanced, diluted fertilizer
Flowering
4-8 weeks (can extend with deadheading)Star-shaped flowers emerge above foliage in pink, red, orange, or white with dark centers; blooms appear in clusters
Continue regular watering and feeding. Deadhead spent flowers to encourage more blooms. Avoid wetting flowers
Post-Bloom & Dormancy Preparation
2-3 weeks before full dormancyFlowers fade, foliage begins to yellow and diminish as plant enters dormancy
Gradually reduce watering as foliage fades. Stop fertilizing. Allow plant to rest; bulbs are storing energy
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; spray with water or insecticidal soap if severe
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Remove with alcohol-dipped cotton swab; treat with neem oil for heavy infestations
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Scrape off by hand; treat with horticultural oil or insecticidal soap
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Allow soil to dry out between waterings; use sand layer on top of soil or sticky traps
Uses
Edible Flowers
CulinarySea Star flowers are edible with a mild, slightly tangy flavor. The flowers and leaves add visual appeal to salads and can be candied as decorative garnishes. [source]
Traditional Herbal Use
MedicinalSome Oxalis species have been used in traditional medicine for digestive support and vitamin C content, though clinical evidence is limited. Always consult healthcare providers before medicinal use. [source]
Indoor Ornamental Plant
HouseholdExcellent as a small potted houseplant for windowsills, desks, or shelf displays. Compact growth habit and cheerful blooms brighten indoor spaces year-round with proper dormancy management. [source]
Cut Flowers & Arrangements
CraftDelicate star-shaped blooms are perfect for small floral arrangements, miniature bouquets, and craft projects. Pressed flowers work well in herbals and art projects. [source]
Pollinator Attraction
WildlifeThe bright star-shaped flowers attract small bees and other pollinators when grown outdoors, supporting local ecosystems and garden biodiversity. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flowers at base with sharp scissors when fully open for longest vase life (5-7 days). Pinch back growing tips occasionally to encourage bushier growth and more blooms. Collect seeds after flowers fade if desired for propagation
Fun Facts
- 🌱 Sea Star Flowers are named for their distinctive five-pointed star shape, resembling starfish found in oceans; the flower's geometry is a natural expression of geometric patterns in nature
- 🌱 Oxalis species move their leaves throughout the day in a behavior called nyctinasty, folding leaf stalks at night and reopening them during the day for light absorption
- 🌱 Sea Star bulbs naturally go dormant and require a cool, dry rest period (similar to bulbs in their native habitat) to reflower; without this dormancy, they may decline over time indoors
Gardening Terms
New to gardening? Learn about terms used in this guide:
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