How to Grow Zinnia, Benary's Giant Yellow
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Zinnia, Benary's Giant Yellow
Zinnia elegans 'Benary's Giant Yellow'
flowerBenary's Giant Yellow is a stunning large-flowered zinnia cultivar producing bright, cheerful golden-yellow blooms on tall, sturdy stems. These impressive flowers can reach 4-5 inches in diameter and are excellent for cutting, bouquets, and garden displays. The plant is vigorous, heat-loving, and provides continuous color from mid-summer through frost.
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Example Zinnia, Benary's Giant Yellow timeline · Pittsburgh, PA (Zone 6b)
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Plant Zinnia, Benary's Giant Yellow
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 Zinnia, Benary's Giant Yellow blooms
Around Jun 16≈ 60 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-11; prefers warm summers and can be grown as an annual anywhere
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Seedling
10-14 daysTiny seedlings with first true leaves emerging; very tender and susceptible to damping-off disease.
Keep soil warm (70-75°F), moist but not wet. Provide bright indirect light. Thin crowded seedlings. Avoid overhead watering.
Vegetative
3-4 weeksPlant develops sturdy stems and multiple sets of leaves. Height ranges from 6 inches to 2-3 feet depending on growth phase.
Pinch back growing tips once plants have 3-4 sets of leaves to encourage bushiness and more stems. Apply balanced fertilizer every 2-3 weeks.
Budding
2-3 weeksSmall buds begin forming at stem tips, indicating transition to flowering phase.
Continue regular watering and fertilizing. Reduce nitrogen, increase phosphorus to support flower development. Deadhead any early small blooms to encourage larger flowers.
Flowering
8-12 weeks or until first frostLarge, fully double golden-yellow blooms (4-5 inches) appear and continue flowering abundantly until frost.
Deadhead spent flowers regularly to promote continuous blooming. Water consistently. Apply low-nitrogen, high-phosphorus fertilizer every 2 weeks.
Seed Production
4-6 weeksIf flowers are not deadheaded, they will develop seed heads with viable seeds for next season.
Allow a few flowers to mature fully on the plant if saving seeds. Collect seed heads after they dry completely and petals fall.
Common Pests
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Spray with neem oil or insecticidal soap; increase humidity by misting; encourage natural predators
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Improve air circulation, avoid overhead watering, apply sulfur dust or baking soda spray, remove affected leaves
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Use yellow sticky traps, spray with neem oil, encourage parasitic wasps
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Hand-pick early morning or evening, use copper tape barriers, apply diatomaceous earth
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Spray with water jet, use insecticidal soap, release ladybugs, plant nearby garlic or onions as deterrents
Uses
Edible flower garnish
CulinaryZinnia petals are edible and add vibrant color and mild flavor to salads, cocktails, and desserts. Use only organically grown flowers never treated with pesticides. [source]
Cut flower arrangements
HouseholdBenary's Giant Yellow is an exceptional cutting flower, with large blooms on long stems that last 10-14 days in water. Perfect for wedding arrangements, floral design, and cottage bouquets. [source]
Pollinator attraction
WildlifeZinnias are magnets for butterflies, bees, and hoverflies, making them valuable for pollinator gardens and supporting beneficial insect populations. [source]
Dried flowers
CraftBenary's Giant Yellow zinnias dry beautifully for dried flower arrangements, wreaths, and crafts. Hang dry in bundles or use silica gel for pressed flowers. [source]
Traditional herbal use
MedicinalIn traditional medicine, zinnia flowers have been used to support respiratory health and as a diuretic. Modern scientific evidence is limited; consult healthcare providers. [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 after dew dries but before heat of the day. Cut stems at a 45-degree angle and immediately place in cool water. Cut flower blooms encourage more flowering—removing spent flowers will extend bloom season for 8-12 weeks. For maximum vase life, change water every 2-3 days and re-cut stems.
Fun Facts
- 🌱 Benary's Giant is a German-bred cultivar originating from the Benary seed company, known for producing some of the largest zinnia flowers in cultivation—blooms can exceed 5 inches in diameter.
- 🌱 Zinnias are native to Mexico and were introduced to Europe by Spanish conquistadors in the 16th century, becoming beloved ornamentals worldwide.
- 🌱 Deadheading (removing spent flowers) signals the plant to produce more blooms; a single plant can produce 100+ flowers throughout the season if regularly deadheaded.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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