How to Grow White Splash
Wikimedia Commons
White Splash
Ipomoea nil 'White Splash'
vineWhite Splash is a charming ornamental morning glory cultivar featuring heart-shaped leaves with distinctive white variegation splashed across green foliage. The plant produces delicate white or pale pink trumpet-shaped flowers that bloom in the morning. It's a vigorous climbing vine ideal for trellises, arbors, and garden structures.
When should you plant White Splash in your zone?
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Example White Splash timeline · Pittsburgh, PA (Zone 6b)
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Plant White 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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Harvest White Splash
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact White 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 warmer climates
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Germination & Seedling
2-3 weeksSeeds sprout within 7-14 days. Young seedlings develop first true leaves with emerging variegation pattern.
Soak seeds overnight to improve germination. Keep soil warm (70-75°F). Provide bright light once sprouted. Thin seedlings to strongest specimens.
Vegetative Growth
3-4 weeksPlant develops multiple stems and climbing tendrils. White splashing becomes more pronounced on heart-shaped leaves. Rapid stem elongation occurs.
Provide sturdy support structure early. Pinch growing tips to encourage bushier growth. Water consistently. Fertilize every 2-3 weeks with balanced fertilizer.
Flowering
6-12 weeksDelicate trumpet-shaped flowers appear along the vine, typically white or pale pink, opening in early morning. Flowers close by afternoon.
Maintain consistent moisture and full sun exposure. Continue light fertilizing. Remove spent flowers to encourage continuous blooming. Support heavy flowering vines.
Seed Development
4-6 weeksFlowers fade and are replaced by small seed pods. Foliage remains lush and decorative throughout.
Allow some flowers to mature into seed pods if seed collection is desired. Otherwise, continue deadheading to extend flower production.
Decline (End of Season)
Variable by zoneIn cooler zones, frost kills the plant as it's frost-tender. Foliage yellows and withers. In warm zones, plant may continue flowering until severely pruned.
Collect mature seed pods before frost in cool climates. Cut back dead growth. Compost spent plant material or save seeds for next season.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge. Use neem oil or insecticidal soap if infestation is severe. Increase humidity.
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Use yellow sticky traps. Apply neem oil or insecticidal soap. Remove heavily infested leaves.
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Hand-pick early morning. Use pheromone traps at distance. Apply spinosad if necessary.
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Remove by hand in early morning. Use copper tape around support structures. Beer traps or diatomaceous earth.
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Improve air circulation. Remove affected leaves. Apply fungicide if needed. Avoid wetting foliage.
Uses
Garden Ornamentation & Vertical Screening
OrnamentalWhite Splash morning glories are perfect for covering trellises, arbors, fences, and pergolas with their stunning white-splashed foliage and delicate flowers. The variegated leaves provide visual interest even when not in bloom. [source]
Seed Saving & Plant Propagation
CraftWhite Splash produces abundant viable seeds that are easy to collect and store. Home gardeners can save seeds annually for cost-effective replanting year after year. [source]
Pollinator Attraction
WildlifeThe bright morning flowers attract bees, hummingbirds, and other beneficial pollinators to the garden, supporting the broader ecosystem. [source]
Living Privacy Screen & Shade Creation
HouseholdDense climbing growth creates natural privacy barriers and can provide dappled shade for patios and outdoor sitting areas during hot months. [source]
Harvest Tips
For ornamental use, flowers are best viewed in early morning before they close. For seed collection, allow pods to mature and dry on the vine. Harvest seed pods when they turn brown and papery, typically 4-6 weeks after flowering. Store dried seeds in cool, dry place for next season.
Fun Facts
- 🌱 Morning glories earned their name because their flowers open in the early morning and close by afternoon, following a circadian rhythm independent of light levels.
- 🌱 The white variegation on White Splash foliage is caused by a genetic variegation pattern that makes each leaf unique, creating a naturally speckled appearance.
- 🌱 Japanese morning glories have been cultivated and celebrated in Japan for over 1,000 years, with White Splash representing a modern ornamental cultivar derived from this rich horticultural tradition.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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