How to Grow Zinnia Polar Bear

Zinnia Polar Bear

Zinnia elegans 'Polar Bear'

flower

Zinnia Polar Bear is a compact annual flower variety prized for its pure white, double dahlia-like blooms that reach 2-3 inches across. This cultivar grows 24-30 inches tall and produces abundant flowers throughout the growing season until frost. It's an excellent choice for cut flowers, borders, and containers, thriving in warm conditions with minimal care.

Growing Conditions

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Sun: Full sun, 6-8 hours daily (minimum 6 hours; more sun produces more flowers)

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Water: Water deeply and regularly, keeping soil consistently moist but not waterlogged. Once established, moderately drought-tolerant but flowers perform best with 1-1.5 inches weekly. Avoid overhead watering to reduce powdery mildew risk.

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Spacing: 12 inches

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Days to maturity: 60-75 days from seed to first blooms

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Planting depth: 1/4 inch for seeds; transplants at same depth as root ball

Soil

Type: Well-draining loamy soil with moderate fertility

pH: 6.0-7.5

Amendments:

Compost or aged manure for organic matter Perlite or coarse sand if soil is heavy or clay-based Balanced general-purpose fertilizer at planting

Growing Zones

Find your zone →

Thrives in zones 3-11 as a warm-season annual; performs best in zones 5-10

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

Growth Stages

Seedling

2-3 weeks

Tiny seedlings with first true leaves appearing; cotyledons visible

Keep soil warm (70-75°F) and moist. Provide bright light or grow lights. Thin seedlings to prevent crowding. Harden off before transplanting outdoors.

Vegetative Growth

3-4 weeks

Plant develops multiple sets of leaves and bushy foliage; no flower buds yet

Pinch back top 1/2 inch when plants reach 6 inches tall to encourage branching. Water regularly. Maintain consistent moisture and apply balanced fertilizer every 2-3 weeks if soil is poor.

Budding

1-2 weeks

Flower buds appear at branch tips; buds are tightly closed green forms

Continue regular watering and feeding. Deadhead any early small blooms to encourage larger flowers later. Ensure full sunlight exposure.

Flowering

8-12 weeks or until frost

Pure white double flowers open with 2-3 inch pompom-like blooms; multiple flowers per plant

Deadhead spent blooms regularly to encourage continuous flowering. Water at soil level to keep foliage dry. Fertilize every 2-3 weeks with low-nitrogen formula to promote blooms over leaves.

Decline & Frost Sensitivity

Until first frost

Flowers continue but plant slows as temperatures drop below 50°F; first frost kills plant

Continue deadheading to extend season as long as possible. Collect seeds from dried flower heads if desired before frost. Plant will be killed by hard freeze.

Companion Planting

Plan your garden →

Plant with:

Salvia Cosmos Rudbeckia Marigold Dusty Miller Celosia Angelonia Verbena

Avoid planting near:

Other tall zinnias that may shade it Plants requiring consistently moist soil (zinnias prefer drier conditions)

Common Pests

Improve air circulation, avoid overhead watering, spray with sulfur or neem oil at first sign of white coating on leaves
Increase humidity, spray with water to dislodge, use insecticidal soap or miticide if severe
Spray with strong water stream, use insecticidal soap, apply neem oil, or introduce ladybugs
Use yellow sticky traps, spray with neem oil or insecticidal soap, improve air circulation
Hand-pick beetles early morning, use pheromone traps away from plants, apply neem oil if infestation is heavy

Uses

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Edible Garnish

Culinary

Zinnia petals are edible and can be used as a decorative garnish for salads, desserts, and cocktails. They add visual appeal and a slightly peppery or bitter flavor to dishes. [source]

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Cut Flower Arrangements

Household

Zinnia Polar Bear produces long-lasting cut flowers ideal for bouquets and floral arrangements, lasting 10-14 days in a vase with fresh water changes. The white blooms complement many color schemes and pair well with other summer flowers. [source]

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Dried Flower Crafts

Craft

The double blooms dry beautifully and hold their shape, making them perfect for dried arrangements, pressed flower crafts, and wreaths. Dried Polar Bear zinnias can last for months in arrangements. [source]

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Pollinator Attraction

Wildlife

Zinnias attract bees, butterflies, and other pollinators throughout the blooming season, providing essential nectar and pollen for beneficial insects. They are particularly attractive to monarch butterflies and native bee species. [source]

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Traditional Herbal Use

Medicinal

In some traditional medicine systems, zinnia flowers have been used to make teas or tinctures believed to support immune function and reduce inflammation, though scientific evidence is limited. [source]

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

Harvest Tips

Cut flowers in early morning when stems are turgid and blooms are fully open but not past peak. Cut at a 45-degree angle just above a leaf node to encourage branching. Deadhead spent blooms by pinching or cutting back to the next lower leaf set to promote continuous flowering. Harvest regularly to keep plant producing more flowers. For dried arrangements, cut when fully open and hang upside-down in a dry, dark location for 1-2 weeks.

Fun Facts

🌱 Zinnia Polar Bear was bred specifically for its pure white color, which is relatively rare in zinnias and creates a striking contrast in gardens and arrangements.
🌱 Zinnias are native to Mexico and were named after Johann Gottfried Zinn, an 18th-century German botanist and physician.
🌱 Deadheading zinnias can extend blooming by 2-3 months; a single plant can produce hundreds of flowers over a season with consistent deadheading.

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