💐 Zinnia Oklahoma Series

The Zinnia Oklahoma Series is a high-performance, early-flowering series of zinnias prized for uniform growth, bright colours, and compact plants. With semi-double blooms in vibrant shades including red, pink, orange, and white, these zinnias are perfect for garden borders, containers, and mass plantings.

This series is known for its heat tolerance, disease resistance, and long-lasting blooms, making it ideal for both home gardeners and professional growers. The compact, sturdy plants produce a continuous flush of flowers throughout the summer, offering excellent cut flower potential for smaller stems

🌱 Growing Information

Botanical Name: Zinnia elegans
Series: Oklahoma
Plant Type: Annual
Height & Spread: 30–45 cm (12–18 in) tall, 25–35 cm (10–14 in) wide
Light Requirements: Full sun
Soil Requirements: Well-drained, fertile soil; moderately drought-tolerant
Sowing:

  • Direct sow after last frost or start indoors 4–6 weeks before frost

  • Sow seeds 6 mm (¼ in) deep

  • Germination: 5–10 days at 20–25°C (68–77°F)

  • Space plants 25–35 cm apart
    Watering: Moderate; avoid wetting foliage
    Fertilizer: Apply balanced fertilizer every 2–3 weeks
    Flowering: 50–60 days from sowing; blooms continuously through summer
    Special Notes:

  • Semi-double 2–3 inch blooms in bright shades

  • Compact, uniform growth ideal for borders and containers

  • Heat- and disease-tolerant, including resistance to powdery mildew

  • Continuous flowering with deadheading

  • Attracts pollinators

 

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