Zinnia 'Oklahoma Yellow'

Oklahoma Yellow (Zinnia elegans)

Oklahoma Yellow Zinnia brightens the garden with medium-sized, fully double blooms in a soft, sunny yellow. Each flower rests atop long, sturdy stems, making it ideal for cutting gardens, borders, or mixed bouquets. Its cheerful, luminous hue brings warmth and radiance to flower beds while blending beautifully with soft creams, corals, or deeper purples for layered, textured displays. Regular harvesting encourages abundant blooms, providing a continuous stream of vibrant flowers that enhance both gardens and floral arrangements.

Vigorous and resilient, Oklahoma Yellow thrives in summer heat and sun with low susceptibility to powdery mildew. Its cut-and-come-again habit ensures multiple harvests over the season, offering excellent vase life. Perfect for gardeners seeking reliable, charming blooms, it pairs beautifully with complementary shades to create timeless, elegant bouquets and lively, colourful garden beds.

DETAILS:

QTY: 25

TYPE: Annual

SITE: Full Sun

DEPTH: 1/4"

GERMINATION: 5-7 days at 21-24°C

HEIGHT: 30-40”

MATURITY: 75-90 days

SPACING: 9-12”

PINCH: When 12” tall


HOW TO GROW:
Indoors (recommended): Sow seeds into seedling containers 4–6 weeks before the last frost. Cover the seeds, as they require darkness to germinate. A heat mat will help maintain an optimal temperature of 21–24°C. Lower temperatures will result in slower germination. Do not allow plants to become root-bound. Harden off seedlings for 7–10 days before transplanting them outdoors after all danger of frost has passed.

Direct Seed (alternative): Sow seeds directly outdoors after the last frost. For a prolonged harvest, succession-sow every two weeks until midsummer.

Pinching: To encourage strong branching and a more abundant bloom, pinch the initial bud or bloom from the plant when it is young. Continue to deadhead spent flowers throughout the season.

Soil Preference and Watering: Zinnias thrive in full sun and prefer well-drained, fertile soil. Keep the soil consistently moist, but avoid overwatering, which can lead to mildew.

Fertilizing: Zinnias are heavy feeders. Amending the soil with compost before planting is recommended. You can also use a balanced, all-purpose fertilizer every 4–6 weeks to encourage continuous blooming.

Harvesting: For bouquets, harvest stems when the flowers are fully open but still firm. To check if a zinnia is ready to be harvested, gently shake the stem; if the neck is wobbly, it's not ready. Harvest in the early morning or late evening and immediately place in a vase of water.