How to Grow Riviera Lilac Splash
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Riviera Lilac Splash
Calibrachoa × hybrida 'Riviera Lilac Splash'
flowerRiviera Lilac Splash is a compact, mounding annual flowering plant featuring small, petunia-like blooms with lilac-purple petals and distinctive white or cream striped patterns. It grows as a tender annual in most climates and is prized for continuous flowering throughout the growing season with minimal maintenance.
When should you plant Riviera Lilac Splash in your zone?
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Example Riviera Lilac Splash timeline · Pittsburgh, PA (Zone 6b)
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Plant Riviera Lilac Splash
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 Riviera Lilac Splash blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Riviera Lilac Splash dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-11; grown as an annual in cooler zones, perennial in zones 9-11
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Seedling
2-3 weeksTiny plants with 2-4 true leaves emerging 7-10 days after germination; very delicate and small
Keep soil moist but not soggy. Provide bright, indirect light. Avoid damping off with good air circulation. Thin seedlings to prevent crowding.
Vegetative Growth
3-4 weeksPlant develops more leaves and branching stems; remains compact and bushy; no flowers yet
Pinch back growing tips when 4-6 inches tall to encourage bushier growth. Water consistently. Apply balanced fertilizer every 2 weeks.
Budding
1-2 weeksSmall flower buds form at the tips of branches; plant continues to grow and branch
Continue regular watering and feeding. Ensure adequate sunlight to promote abundant budding. Remove any diseased foliage.
Flowering
8-12 weeks and beyond with deadheadingSmall trumpet-shaped blooms with lilac-purple petals and white/cream striped markings open continuously; plant maintains compact, mounding shape
Deadhead spent flowers regularly to encourage continuous blooming. Water consistently. Switch to phosphorus-rich fertilizer to promote more flowers over foliage. Watch for pests and diseases.
Peak Season & Maintenance
Varies; typically through first frost in cooler zonesPlant is fully covered in blooms; growth may slow in extreme heat; maintains ornamental appearance
Continue deadheading. May reduce watering slightly in cooler periods but keep consistently moist. Cut back if plant becomes leggy mid-season. In zones 9-11, may persist through winter with frost protection.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; use reflective mulches; encourage beneficial insects like ladybugs
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Increase humidity; spray with water; use miticide if severe; ensure adequate spacing for air circulation
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Spray with strong water stream; apply insecticidal soap or neem oil; release ladybugs
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Improve air circulation; avoid overhead watering; apply fungicide if needed; remove affected leaves
Uses
Not for consumption
CulinaryRiviera Lilac Splash is purely ornamental and toxic if ingested. It should never be used for culinary purposes. [source]
Container gardening and bedding
HouseholdExcellent choice for hanging baskets, pots, window boxes, and annual beds due to its compact, mounding growth habit and prolific flowering. Its trailing nature makes it ideal for cascading displays. [source]
Cut flower arrangements
CraftThough delicate, the small flowers can be used in fresh floral arrangements or pressed flower crafts for a unique decorative element. [source]
Pollinator attraction
WildlifeThe bright flowers attract bees, butterflies, and hummingbirds, making it valuable for supporting pollinator populations in gardens. [source]
Landscape color and texture
HouseholdThe distinctive striped lilac blooms provide striking ornamental color in gardens, patios, and public landscapes with minimal fuss and extended bloom time. [source]
Harvest Tips
Calibrachoa is grown for ornamental flowers, not harvest. Deadhead (pinch off spent blooms) regularly throughout the season to encourage continuous flowering and maintain plant shape. Cut back leggy growth mid-season if needed to rejuvenate the plant.
Fun Facts
- 🌱 Calibrachoa is sometimes called 'Million Bells' because established plants can produce hundreds of small, bell-shaped flowers simultaneously.
- 🌱 Riviera series calibrachoas were specifically bred for compact growth and prolific flowering, making them more cold-tolerant and vigorous than older cultivars.
- 🌱 Unlike petunias, calibrachoas are much smaller and have a more delicate appearance, but they require similar care and are often marketed as 'mini petunias.'
Gardening Terms
New to gardening? Learn about terms used in this guide:
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