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How to Grow Balsam Zanzibar Red

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Balsam Zanzibar Red

Impatiens walleriana 'Zanzibar Red'

flower

Balsam Zanzibar Red is a vibrant, compact flowering annual with deep crimson-red blooms that emerge continuously throughout the growing season. This cultivar is prized for its reliable performance in shade and semi-shade conditions, making it an excellent choice for beds, borders, and containers. The plant produces dense foliage with succulent stems and features abundant double or semi-double flowers.

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Example Balsam Zanzibar Red timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Balsam Zanzibar Red

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Balsam Zanzibar Red blooms

    Around Jun 1

    ≈ 45 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Balsam Zanzibar Red 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. Tolerates shade better than most flowering plants
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Water: Keep soil consistently moist but not waterlogged. Water regularly, especially during hot weather. Prefers consistent moisture; drought stress causes wilting and flower drop
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Spacing: 8-12 inches apart inches
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Days to maturity: 45-60 days from transplant to first flowers
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Planting depth: Sow seeds on soil surface (light-dependent germination); transplants should be planted at same depth as nursery container

Soil

Type: Rich, moist, well-draining loamy soil
pH: 6.0-6.8
Amendments:
Compost peat moss organic matter aged bark

Growing Zones

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Thrives in zones 2-11 as an annual; perennial in zones 10-11

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

1

Seedling

2-3 weeks

Tiny leaves emerge on delicate stems. Plants are tender and require humid conditions. Seedlings appear within 10-14 days under proper conditions

Maintain consistent moisture and temperature (70-75°F). Do not cover seeds; they need light to germinate. Provide bright indirect light. Keep humidity high

2

Vegetative Growth

3-4 weeks

Plants develop bushy foliage with multiple stems and increasingly dense green leaves. Succulent stems are tender and fragile. Compact growth habit becomes apparent

Pinch off top growth to encourage branching and bushier form. Continue consistent watering and moisture. Provide shade cloth in intense sun. Begin light fertilizing

3

Flowering

6-12 weeks (continues until frost)

First crimson-red blooms appear at branch tips. Flowers are semi-double or double, appearing continuously. Plant reaches mature height of 10-18 inches

Deadhead spent flowers to encourage continuous blooming. Maintain consistent moisture—critical during this stage. Apply balanced liquid fertilizer every 2-3 weeks. Ensure adequate shade to prevent petal fade

4

Peak Blooming & Maintenance

6-8 weeks (or until frost)

Plant produces abundant red flowers continuously. Foliage remains lush and green. Plants are full and showy in containers and beds

Continue deadheading. Water deeply and consistently. Watch for spider mites in dry conditions and mealybugs on stems. Fertilize every 2 weeks with diluted liquid fertilizer

5

Frost Sensitivity & Season End

Frost kills plant

Plant deteriorates with first light frost (32°F). Foliage blackens and stems collapse. Annual cycle ends

Pull plants after frost kills them. In zones 10-11, plants may overwinter; cut back and reduce water in winter for potential regrowth. Otherwise, compost plant material

Companion Planting

Plan your garden →

Plant with:

Hostas ferns impatiens (other colors) begonias coleus caladiums torenia wishbone flower astilbe coral bells

Avoid planting near:

Very aggressive spreading plants extremely dry-loving plants (sedums, echeveria)

Common Pests

  • Mist foliage regularly to increase humidity. Spray with water to dislodge. Use miticide if severe. Avoid overly dry conditions

  • Check stems and leaf axils regularly. Remove with alcohol-soaked cotton swab. Spray with insecticidal soap or neem oil every 7-10 days

  • Use yellow sticky traps. Spray undersides of leaves with insecticidal soap or horticultural oil. Increase air circulation

  • Allow soil surface to dry slightly between waterings. Use yellow sticky traps. Apply sand mulch on soil surface. Use beneficial nematodes if severe

  • Improve air circulation. Remove infected leaves. Spray with sulfur or baking soda solution. Avoid overhead watering

Uses

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Edible flowers

Culinary

Impatiens walleriana petals are edible and non-toxic, used as colorful garnishes for desserts, salads, and beverages. The delicate red petals add visual appeal to gourmet dishes [source]

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Cut flowers

Household

Deep red Zanzibar flowers can be cut and arranged in small bouquets or mixed arrangements. Blooms last 3-5 days in water when cut in the morning [source]

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Flower pressing and drying

Craft

The delicate petals can be pressed in flower presses or books for botanical art projects, scrapbooking, and decorative crafts. The vibrant red color fades somewhat when dried [source]

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Pollinator attraction

Wildlife

Impatiens flowers attract hummingbirds and bees despite their preference for shaded environments. The abundant nectar production makes them valuable for pollinator gardens [source]

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Container and shade gardening

Household

Zanzibar Red is ideal for shaded containers, hanging baskets, patio displays, and under-tree bedding where sun-loving flowers struggle. Its compact habit and continuous blooms make it perfect for color in difficult shade spots [source]

Harvest Tips

This is an ornamental flower; no harvest for food. Deadhead spent flowers regularly by pinching or cutting just below the bloom to encourage continuous flowering throughout the season. Plants typically flower prolifically until killed by frost

Fun Facts

  • 🌱 The name 'Impatiens' comes from the Latin word 'impatiens,' referring to the plant's impatience—its seed pods burst open explosively when touched when fully mature, flinging seeds several feet away as a natural seed dispersal mechanism
  • 🌱 Zanzibar impatiens originate from the African island of Zanzibar (now part of Tanzania) and were introduced to Europe in the 1890s, becoming one of the most popular shade-loving ornamental plants worldwide
  • 🌱 Impatiens walleriana is also known as 'busy lizzie' because it flowers so profusely and continuously, and it performs exceptionally well in north-facing gardens and shaded patios where most annual flowers fail to thrive

Gardening Terms

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

Annual Compost Cultivar Deadhead Partial Shade
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