How to Grow Imp Cultivars

Imp Cultivars

Impatiens walleriana (most common)

flower

Imp cultivars are compact, bushy ornamental flowers known for their vibrant blooms and shade tolerance. These popular bedding plants produce continuous flowers in shades of red, pink, purple, white, and bicolor patterns throughout the growing season. They are ideal for containers, borders, and shaded garden areas.

Looking for a specific variety?

Imp Blush Imp Red Imp White Imp Orange Imp Salmon Imp Lavender

When should you plant Imp Cultivars in your zone?

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Example Imp Cultivars timeline · Pittsburgh, PA (Zone 6b)

Plant Imp Cultivars
Around Apr 17

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

Watering, feeding, and pest-watch reminders.
First Imp Cultivars blooms
Around Jun 1

≈ 45 days after planting

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

Growing Conditions

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Sun: Partial shade to full shade; 2-4 hours of indirect sunlight daily

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Water: Keep consistently moist but not waterlogged; water when top inch of soil is dry. Daily watering may be needed in hot weather. Sensitive to both drought and overwatering.

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Spacing: 8-12 inches

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Days to maturity: 45-60 days to first flowers

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Planting depth: Sow seeds on soil surface (light-dependent germination); plant transplants at same depth they were growing

Soil

Type: Rich, moist, well-draining loamy soil

pH: 6.0-6.8

Amendments:

Peat moss Compost Perlite Coconut coir

Growing Zones

Find your zone →

Thrives in zones 5-10 as annuals; grown year-round in zones 10-11

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

Seedling

7-14 days

Tiny seedlings emerge with cotyledons and first true leaves appearing. Plants are delicate and require high humidity.

Maintain consistent moisture and warmth (70-75°F). Keep soil surface moist but not soggy. Provide bright indirect light. Avoid damping off by ensuring good air circulation.

Vegetative Growth

2-4 weeks

Young plants develop multiple stems and leaves, becoming bushier. Plants are still establishing root systems and foliage.

Pinch off growing tips when plants are 4-6 inches tall to encourage branching. Maintain consistent moisture. Begin light feeding with diluted balanced fertilizer every 2 weeks.

Early Flowering

2-3 weeks

First flower buds appear at branch tips. Plants are becoming full and rounded in shape.

Continue pinching if desired for fuller plants (stop 4-6 weeks before desired flowering time). Increase fertilizer frequency to weekly. Ensure adequate moisture as flowering increases water demand.

Peak Flowering

6-12 weeks or until frost

Plants are covered in vibrant flowers. Continuous blooming occurs with proper care. Foliage may become less visible under flower abundance.

Deadhead spent flowers to encourage more blooms. Water consistently—critical during this stage. Feed weekly with bloom-promoting fertilizer (higher phosphorus). Monitor for spider mites in hot, dry conditions.

Decline/End of Season

Variable (until frost or voluntary decline)

Flowering slows as temperatures drop or day length decreases. Plants may become leggy if not maintained. Foliage may yellow.

In cool climates, plants decline with first frost. In warm zones, cut back and bring indoors for winter. Reduce fertilizer. Remove diseased or dead foliage to prevent fungal issues.

Companion Planting

Plan your garden →

Plant with:

Begonias Hostas Ferns Coleus Sweet potato vine Caladiums Bromeliads Astilbe

Avoid planting near:

Plants requiring full sun and dry conditions Succulents Cacti Mediterranean herbs (rosemary, lavender)

Common Pests

Increase humidity, spray with water to dislodge mites, use insecticidal soap or neem oil weekly. Avoid hot, dry conditions.
Use yellow sticky traps, spray with insecticidal soap or neem oil every 7-10 days. Remove heavily infested leaves.
Allow soil surface to dry slightly between waterings, use sand layer on soil surface, apply Bti (Bacillus thuringiensis israelensis) to soil.
Inspect regularly, remove with rubbing alcohol on cotton swab, spray with insecticidal soap, isolate infested plants.
Spray with strong water stream, use insecticidal soap, apply neem oil, introduce ladybugs for biological control.

Uses

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Edible Flowers

Culinary

Impatiens flowers are edible and can be used as garnishes for salads, desserts, and beverages. They add a subtle, mild flavor and attractive colors to culinary presentations. [source]

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Container Gardening & Landscaping

Household

Imp cultivars are ideal for hanging baskets, window boxes, patio containers, and shade garden borders. Their compact habit and prolific flowering make them versatile for both indoor and outdoor displays. [source]

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Traditional Herbal Use

Medicinal

In some traditional medicine systems, Impatiens species have been used to treat skin conditions and minor wounds, though scientific evidence is limited. Modern herbal practitioners occasionally reference antimicrobial properties. [source]

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Flower Arrangements & Craft Projects

Craft

Fresh Impatiens blooms are suitable for small bouquets and floral arrangements, though they are delicate and short-lived when cut. Pressed flowers can be used in craft projects and botanical art. [source]

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Pollinator Support

Wildlife

Impatiens flowers attract hummingbirds and small pollinators, particularly in shaded gardens where nectar sources are limited. They provide food resources throughout the blooming season. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Not typically harvested as these are ornamental flowers. Deadheading (removing spent flowers) encourages continuous blooming throughout the season. Pinch stems occasionally for floral arrangements or plant shaping.

Fun Facts

🌱 The name 'Impatiens' refers to the plant's seed pods, which 'impatiently' explode and scatter seeds when touched or disturbed—a mechanism called ballistic seed dispersal.
🌱 Imp cultivars come in hundreds of registered varieties with names like 'Imp Blush', 'Imp Red', and 'Imp White', all bred for compact growth and abundant flowering.
🌱 Impatiens are so shade-tolerant that they are sometimes called 'Touch-me-nots' or 'Busy Lizzies,' and in tropical regions, they naturalize readily in shaded understory areas.

Gardening Terms

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

Cultivar Damping Off Deadhead Partial Shade pH True Leaves

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