California Giant Mix Zinnia Seeds

  • California Giant Mix Zinnia flower seeds producing massive, double-petaled blooms in a burst of continuous summer color for cut gardens.
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California Giant Mix Zinnia Seeds

California Giant Mix Zinnia Seeds

$3.95 USD
$3.95 USD
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Packet Size: 175 Seeds

California Giant Mix Zinnia delivers towering color with massive 4–5 inch blooms that fill summer gardens with vivid rose, gold, coral, and scarlet shades. These tall, heat-loving annuals reach up to 48 inches and produce a steady flush of giant flowers that are perfect for cutting and long-lasting displays. Ideal for bright borders, pollinator gardens, and nonstop seasonal color, this mix thrives in warm weather and rewards frequent harvesting with even more blooms.

We ship to the Continental U.S. and Alaska only. We cannot ship to Hawaii, overseas U.S. military bases, or U.S. territories.

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Growing Information

Planting

  • Sow seeds directly outdoors once the soil has fully warmed, or start indoors 4–6 weeks before the last frost for earlier blooms.
  • Plant seeds in well-draining soil and full sun, keeping them lightly covered to encourage quick germination.
  • Thin seedlings to allow ample room for mature plants to reach their 40–48 inch height and broad spread.
  • Choose a location with excellent sunlight exposure to support the development of large 4–5 inch semi-double flowers.
  • In hotter southern regions, consider sowing in midsummer so the plants can thrive in late-season warmth.
  • Avoid overcrowding to reduce disease pressure and help each tall plant produce its best floral display.

Maintenance

  • Provide consistent watering at the base of plants to reduce the chance of powdery mildew on the foliage.
  • Space plants well to promote airflow around the 48-inch-tall, bushy stems and maintain overall plant vigor.
  • Deadhead spent blooms promptly to stimulate new flower production throughout the growing season.
  • Apply a balanced fertilizer lightly during peak growth to support strong stems and bright, full flower heads.
  • Mulch around the base to maintain soil moisture during hot spells and reduce weed competition.

Harvest & Storage

  • Cut blooms in the morning once flowers are fully open to encourage continuous reblooming.
  • Harvest stems when the flowers feel firm and do not wiggle at the base, ensuring better vase life.
  • Remove foliage below the waterline and place stems in clean, cool water immediately after cutting.
  • Store finished arrangements away from direct sunlight to extend the longevity of the 4–5 inch blooms.
  • Regular harvesting throughout the 75–90 days to maturity helps maintain strong flowering through late summer.