How to Grow Zinnia Oklahoma Red

Zinnia Oklahoma Red

Zinnia elegans 'Oklahoma Red'

flower

Oklahoma Red is a compact zinnia cultivar bred for heat and drought tolerance, producing vibrant red double flowers on bushy plants. This variety is an All-America Selections winner known for its prolific blooming and disease resistance. It's ideal for borders, containers, and cut flower arrangements.

Growing Conditions

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Sun: Full sun, 6-8 hours daily (thrives in intense heat and bright light)

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Water: Moderate watering; allow soil to dry between waterings. Drought-tolerant once established. Water at soil level to prevent powdery mildew. Reduce watering in fall.

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Spacing: 12 inches

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Days to maturity: 45-60 days to first flowers

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Planting depth: 1/8 inch (surface sow or barely cover seeds); germinate at 70-75°F

Soil

Type: Well-draining loamy to sandy soil

pH: 6.0-7.5

Amendments:

Compost Peat moss Perlite for drainage Balanced slow-release fertilizer

Growing Zones

Find your zone →

Thrives in zones 2-11; performs exceptionally well in hot climates (zones 7-10)

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 cotyledons emerge within 5-10 days. True leaves appear shortly after, initially appearing simple and linear.

Maintain warm temperatures (70-75°F), keep soil moist but not waterlogged. Provide bright light to prevent leggy growth. Thin seedlings to prevent crowding.

Vegetative Growth

3-4 weeks

Plant develops bushy structure with multiple stems and increasingly larger pinnate leaves. No flower buds present yet.

Pinch off top 1/2 inch when plants are 4-6 inches tall to encourage branching and bushier form. Gradually acclimate to outdoor conditions before transplanting. Water consistently but avoid waterlogging.

Budding

1-2 weeks

Flower buds form at branch tips. Buds are initially small and tightly closed, resembling tiny green nodules.

Begin light fertilizing (diluted balanced fertilizer) to support flower development. Ensure consistent watering and full sun exposure. Remove any competing lower foliage if desired for air circulation.

Flowering

8-12 weeks (continuous until frost)

Double red flowers open, revealing tightly packed petals in brilliant red tones. Plants produce numerous blooms continuously throughout the season.

Deadhead spent flowers regularly to encourage continuous blooming. Water at soil level to prevent foliar diseases. Apply balanced fertilizer every 3-4 weeks. Monitor for spider mites and powdery mildew in hot, dry conditions.

Senescence

2-4 weeks (until killing frost)

As temperatures cool in fall or with frost approach, flowering slows. Plants may become woody and less floriferous.

Continue deadheading to extend bloom season. Reduce watering as growth slows. Allow final flowers to set seed if collecting seeds for next year. Pull plants after hard frost.

Companion Planting

Plan your garden →

Plant with:

Salvia Celosia Marigold Dusty Miller Alyssum Verbena Vinca Ornamental grasses Dahlias Coneflowers

Avoid planting near:

Tall plants that shade zinnias Plants requiring consistently moist soil Fennel (allelopathic)

Common Pests

Increase humidity, spray with water in early morning, use neem oil or insecticidal soap. Avoid excessive nitrogen fertilizer which promotes susceptibility.
Water at soil level only, ensure good air circulation, avoid crowding. Apply sulfur powder or neem oil at first sign. Remove affected leaves.
Use yellow sticky traps, spray with insecticidal soap or neem oil. Encourage natural predators like ladybugs.
Spray with strong water stream, use insecticidal soap or neem oil. Encourage beneficial insects like parasitic wasps.

Uses

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Edible Flowers

Culinary

Zinnia petals are edible and can garnish salads, desserts, and beverages, adding vibrant color and a slightly peppery flavor. They contain beneficial antioxidants and are entirely non-toxic. [source]

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Cut Flowers & Arrangements

Household

Oklahoma Red is excellent for fresh cut flower arrangements, lasting 7-10 days in water. The compact yet full double blooms work beautifully in vases, bouquets, and wedding arrangements. [source]

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Traditional Folk Medicine

Medicinal

Zinnias have been used in traditional Chinese and Ayurvedic medicine for their potential anti-inflammatory and antibacterial properties. Flower infusions have been prepared to support immune function. [source]

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Pollinator Attraction

Wildlife

The abundant flowers attract bees, butterflies, and hummingbirds, making Oklahoma Red an excellent addition to pollinator gardens. Double flowers may be less accessible to some pollinators than single varieties. [source]

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Dried Flower Arrangements

Craft

Zinnia flowers dry beautifully when hung upside-down in a cool, dark location. Dried flowers retain their color and can be used in wreaths, potpourri, and long-lasting floral crafts. [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 early in the morning when stems are fully hydrated. Cut just above a leaf node to encourage branching and continued flowering. Zinnias last 7-10 days in a vase with fresh water changed every 2 days. For seed collection, allow flowers to fully mature and dry on the plant, then cut seed heads and air-dry indoors before extracting seeds.

Fun Facts

🌱 Oklahoma Red is an All-America Selections (AAS) award winner, meaning it was tested and proven superior in performance across multiple growing regions in North America.
🌱 Zinnias are native to Mexico and were cultivated by the Aztecs; the name 'zinnia' honors botanist Johann Gottfried Zinn. The genus contains over 20 species.
🌱 Oklahoma Red shows exceptional disease resistance compared to many other zinnia varieties, particularly to powdery mildew and bacterial leaf spot, making it reliable for humid climates.

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