How to Grow Scaevola Blue

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Scaevola Blue

Scaevola aemula

flower

Scaevola Blue is a tender perennial flowering plant known for its distinctive fan-shaped, blue-purple flowers with white centers. It's a trailing or spreading plant that produces abundant blooms throughout warm seasons, making it ideal for containers, hanging baskets, and garden beds. This low-maintenance plant thrives in warm climates and attracts pollinators with minimal fuss.

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Example Scaevola Blue timeline · Pittsburgh, PA (Zone 6b)

Plant Scaevola Blue
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
First Scaevola Blue blooms
Around May 17

≈ 30 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Scaevola Blue dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6-8 hours daily; tolerates light afternoon shade in hot climates

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Water: Keep soil consistently moist but not waterlogged; reduce watering in winter; more frequent watering needed in containers and during hot weather

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Spacing: 12 inches

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Days to maturity: 30-45 days to first blooms from established transplants

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Planting depth: Surface sown or 1/4 inch deep for seeds; transplants at same depth as rootball

Soil

Type: Well-draining potting soil or sandy loam

pH: 6.0-7.0

Amendments:

Peat moss or coco coir Perlite or sand for drainage Compost for light nutrients

Growing Zones

Find your zone →

Thrives in zones 9b-11; grown as an annual in cooler zones

9b 10a 10b 11a 11b

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Growth Stages

Seedling

3-4 weeks

Tiny green leaves emerge from seed; very delicate and slow-growing at first

Keep soil warm (70-75°F) and consistently moist; provide bright light; thin seedlings to prevent damping off

Vegetative

3-4 weeks

Plant develops multiple stems and leaf growth; trailing branches begin to form

Pinch growing tips to encourage bushier growth; maintain steady moisture; fertilize lightly every 2-3 weeks

Budding

2-3 weeks

Small purple-blue buds form at branch tips; plant becomes fuller and more compact

Continue light fertilization; ensure adequate sunlight to promote bud set; reduce nitrogen to encourage flowering

Flowering

2-4 months or until frost

Abundant fan-shaped blue-purple flowers with white centers bloom continuously; trailing habit becomes prominent

Deadhead spent flowers to encourage continuous blooming; maintain consistent moisture; fertilize every 2 weeks with balanced or bloom-promoting fertilizer

Winter Rest

2-3 months or until frost

In zones 9-10, plant may go semi-dormant with reduced flowering; in zone 11, blooming may continue at slower rate

Reduce watering; provide shelter from frost; cut back dead growth in spring; minimal fertilizer

Companion Planting

Plan your garden →

Plant with:

Verbena Petunias Bacopa Calibrachoa Ornamental grasses Dusty Miller Creeping Jenny

Avoid planting near:

Plants requiring heavy fertilizer (may promote foliage over flowers) Very tall plants that shade delicate growth

Common Pests

Spray with insecticidal soap or neem oil; increase air circulation; use yellow sticky traps
Mist plant regularly; use miticide spray; spray underside of leaves with water to dislodge
Remove with cotton swab dipped in rubbing alcohol; apply insecticidal soap; isolate infested plants
Prune off heavily infested branches; treat with horticultural oil spray during dormant season

Uses

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Container and Hanging Basket Display

Ornamental

Scaevola Blue is prized for its trailing habit and abundant blue flowers, making it an excellent choice for hanging baskets, window boxes, and container gardens. The cascading growth creates a full, attractive display. [source]

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Garden Bedding Plant

Ornamental

Use as a low-growing ground cover or border plant in warm-climate gardens. Its spreading habit and continuous flowers provide season-long color with minimal maintenance. [source]

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Pollinator Attractor

Wildlife

The fan-shaped flowers attract butterflies, bees, and hummingbirds, making it valuable for pollinator gardens. It provides nectar throughout the blooming season. [source]

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Heat and Drought Tolerance

Household

Once established, Scaevola Blue tolerates heat, humidity, and periods of dry weather better than many tender perennials, making it suitable for challenging garden locations. [source]

Harvest Tips

Scaevola Blue is a flowering ornamental, not harvested for food. Deadhead (remove) spent flowers regularly to encourage continuous blooming throughout the season. Cut back stems by up to one-third in mid-summer if plant becomes leggy. In frost-free zones, prune in early spring to rejuvenate growth.

Fun Facts

🌱 The name 'Scaevola' comes from the Latin word meaning 'left-handed,' referring to the fan-shaped flowers that appear to face to one side.
🌱 Scaevola Blue is native to Australia and requires warm temperatures; it cannot tolerate frost and should be grown as an annual in most of North America.
🌱 This plant self-cleans by dropping spent flowers naturally, reducing the need for constant deadheading compared to many other ornamentals.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Damping Off Deadhead Full Sun Perennial

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