How to Grow Neon Flash
Wikimedia Commons
Neon Flash
Impatiens hawkeri × Impatiens walleriana hybrid
flowerNeon Flash is a vibrant hybrid impatiens cultivar known for its brilliant, neon-bright flowers in hot pink, orange, red, and purple shades. It's a compact, bushy annual that produces continuous blooms throughout the growing season, making it ideal for containers, hanging baskets, and shaded garden beds.
When should you plant Neon Flash in your zone?
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Example Neon Flash timeline · Pittsburgh, PA (Zone 6b)
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Plant Neon Flash
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 Neon Flash blooms
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Neon Flash dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-11 as an annual; grown year-round in zones 9-11
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Get my Neon Flash timeline →Growth Stages
Seedling
2-3 weeksTiny seedlings emerge with two small cotyledons (seed leaves) and develop their first true leaves within 1-2 weeks
Maintain high humidity and consistent moisture; provide bright indirect light; keep temperature between 70-75°F; do not allow to dry out
Vegetative
2-4 weeksPlant develops multiple stems and bushy growth with soft, tender foliage; leaves are green, tender, and oval-shaped
Pinch back stem tips to encourage branching and bushier growth; maintain consistent moisture and humidity; feed with balanced fertilizer every 2 weeks; ensure adequate light
Early Flowering
1-2 weeksFirst buds appear at stem tips; small flowers begin to open in vibrant neon colors (pink, orange, red, purple)
Continue pinching if desired to delay flowering for fuller plant; maintain consistent watering and humidity; apply fertilizer every 10-14 days; remove any diseased foliage
Full Flowering
8-12 weeks or until frostPlant is covered in bright, continuous blooms; flowers have distinctive flat face and come in intense neon shades with often bicolor patterns
Deadhead spent flowers to encourage more blooming; maintain consistent moisture and humidity; feed weekly with balanced or bloom-boosting fertilizer; watch for pests and disease
End of Season
Variable, ends at first frostFlowering slows as temperatures cool and daylight decreases in fall; plant may become straggly if not maintained
In zones 3-8, plan to compost plant as frost approaches; in warmer zones, heavy pruning may rejuvenate growth; reduce watering as growth slows
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 every 7 days; increase humidity to discourage
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Use yellow sticky traps; spray with neem oil or insecticidal soap; encourage natural predators like ladybugs
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Remove with cotton swab dipped in rubbing alcohol; spray with neem oil; isolate infected plants
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Remove affected leaves; improve air circulation; avoid overhead watering; apply fungicide if severe
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Improve air circulation; reduce humidity if possible; spray with sulfur or baking soda solution; remove affected foliage
Uses
Edible Flowers for Garnish
CulinaryThe vibrant flowers are edible and can garnish salads and desserts. Their sweet flavor and striking color make them popular in high-end culinary presentations. [source]
Container & Landscape Decoration
HouseholdNeon Flash is a premier choice for hanging baskets, window boxes, container gardens, and shaded garden beds. Its intense, neon colors provide visual impact with minimal maintenance once established. [source]
Cut Flower Arrangements
HouseholdStems with flowers last 5-7 days in water, making them suitable for small fresh flower arrangements and floral designs. [source]
Traditional Herbal Uses
MedicinalImpatiens species have been used in traditional medicine for treating skin irritations and inflammatory conditions, though scientific evidence is limited. [source]
Pollinator Support
WildlifeThe abundant nectar-rich flowers attract hummingbirds, bees, and other pollinating insects, making it valuable for wildlife gardens. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Neon Flash is an ornamental flower—simply remove spent blooms regularly (deadheading) to encourage continuous flowering. Pinch or prune stems back by 1/3 every 3-4 weeks to maintain compact, bushy shape and maximize flower production. Cut stems for fresh flower arrangements by cutting just above a leaf node.
Fun Facts
- 🌱 The name 'impatiens' comes from the Latin word for 'impatient,' referring to how the seed pods burst open and scatter seeds at the slightest touch when mature.
- 🌱 Neon Flash's vibrant, neon-bright colors are relatively modern developments in impatiens breeding, achieved through intensive horticultural selection in the last few decades.
- 🌱 Impatiens are among the easiest flowers to propagate from cuttings—simply place a stem cutting in water, and roots will develop within 1-2 weeks.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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