How to Grow Benary's Giant White Zinnia
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Benary's Giant White Zinnia
Zinnia elegans 'Benary's Giant White'
flowerBenary's Giant White is a cultivar of common zinnia known for its large, double flowers with pure white petals and impressive height. This annual flowering plant produces abundant blooms on sturdy stems, making it ideal for cut flowers and garden displays. It's a reliable producer of exhibition-quality flowers throughout the growing season.
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Example Benary's Giant White Zinnia timeline · Pittsburgh, PA (Zone 6b)
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Plant Benary's Giant White Zinnia
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 Benary's Giant White Zinnia blooms
Around Jun 26≈ 70 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Zones 2-11 as an annual; thrives in warm climates with full sun
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Seed Germination
7-14 daysTiny seeds beginning to sprout, requiring consistent moisture and light exposure. First true leaves emerging within 7-10 days.
Keep soil moist (not wet), maintain warm temperatures (70-75°F), provide bright light. Do not cover seeds completely. Use a heat mat to accelerate germination.
Seedling
3-4 weeksYoung plants developing 2-4 true leaves, establishing a small root system. Plants are delicate and vulnerable to damping off.
Provide bright light 14-16 hours daily. Thin crowded seedlings. Keep soil moist but ensure good air circulation. Avoid overhead watering. Maintain 65-70°F.
Vegetative Growth
3-4 weeksRapidly growing plant with multiple sets of leaves and developing branching structure. Plant builds height and stem thickness.
Pinch back growing tips when 6-8 inches tall to encourage bushier growth and more flowers. Gradually acclimate to outdoor conditions if grown indoors. Apply balanced fertilizer every 2-3 weeks.
Flowering
8-12 weeks (continuous until frost)Plant produces large, double white flowers on strong stems. Blooms are fully formed and exhibition-quality, measuring 4-6 inches across.
Deadhead spent flowers regularly to promote continuous blooming. Provide stakes or support for tall stems if needed. Continue regular feeding with lower-nitrogen fertilizer (5-10-10). Water consistently.
Decline
2-4 weeks before frostAs temperatures drop and frost approaches, flowering slows and plant vigor decreases. First frost will kill the plant.
Harvest mature flowers for drying or seed saving. Allow some flowers to fully develop seed heads if collecting seeds. Remove entire plant after first frost.
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil. Increase humidity and air circulation. Monitor leaf undersides regularly.
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Improve air circulation, avoid wetting foliage. Apply sulfur dust or fungicide at first sign. Remove infected leaves.
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Use yellow sticky traps, spray with insecticidal soap or neem oil. Remove heavily infested leaves.
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Spray with strong water stream, use insecticidal soap, or apply neem oil. Attract beneficial insects like ladybugs.
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and
Hand-pick in early morning, use beer traps, apply diatomaceous earth around base. Remove debris and mulch that provide shelter.
Uses
Edible Flower Garnish
CulinaryZinnia petals are edible and add visual appeal to salads, desserts, and beverages. Their mild flavor and striking white color make them ideal for garnishing plates and cakes. [source]
Cut Flowers & Floral Arrangements
CraftBenary's Giant White zinnias are prized for their large, long-lasting blooms on tall stems, making them excellent for bouquets, wedding arrangements, and professional floral design. They hold their form and freshness for extended periods in water. [source]
Dried Flowers
CraftWhite zinnia blooms dry beautifully and retain their form and color, making them perfect for dried flower arrangements, wreaths, and craft projects that last indefinitely. [source]
Pollinator Support
WildlifeZinnias attract numerous pollinators including bees, butterflies, and hummingbirds, supporting local ecosystems while adding movement and color to the garden. [source]
Garden Display & Landscape Beauty
HouseholdThese bold white flowers create striking visual impact in garden beds, borders, and containers, providing continuous color throughout the summer and fall season. [source]
Harvest Tips
Harvest flowers in early morning after dew dries but before heat builds. Cut stems at a 45-degree angle just above a leaf node, leaving at least 2 nodes on the plant. Place immediately in cool water. Remove lower leaves from stems. Flowers last 10-14 days in a vase. Deadheading spent blooms extends flowering season. For seed saving, allow final flowers to fully mature and dry on the plant; collect seed heads when brown and papery.
Fun Facts
- 🌱 Benary's Giant White was developed by the renowned German seed company Ernst Benary and has been a prize-winning cut flower variety for decades.
- 🌱 Zinnias were named after Johann Gottfried Zinn, an 18th-century German botanist, and are native to Mexico where they were cultivated by the Aztecs.
- 🌱 This variety's large double flowers are technically a mutation of the plant's natural form, bred to have multiple layers of petals for a fuller, more dramatic bloom.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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