Release in Fall of 2026

Bring a spectacular explosion of giant, bold, and festive color to your summer garden with our California Giant Mix Zinnias. A legendary heirloom favorite since the 1920s, this massive variety produces colossal, semi-double to fully-double blossoms stretching an incredible 4 to 5 inches across. Reaching gracefully into the sky on sturdy, elegant stems, this mix showcases a magnificent, eye-catching color palette of fiery crimsons, bright oranges, canary yellows, soft pinks, deep purples, and snowy white.

Growing into robust, bushy plants that stand 3 to 4 feet tall, California Giant Zinnias are the absolute crown jewel for back-borders, cutting gardens, and cottage garden styles. They bloom relentlessly from early summer all the way until the first hard freeze of winter. If you love bringing fresh flowers into your home, these are a dream come true—the more aggressively you clip the blossoms for indoor vases, the faster the plant branches out to reward you with a double wave of brand-new outdoor buds!

The B&KM Farms Promise

Like all of our varieties, these seeds are 100% heirloom, non-GMO, and completely untreated. Every single packet is grown, harvested, and carefully packaged entirely by hand right here in the USA by our family team. We skip the massive, impersonal factory assembly lines so that we can ensure only the freshest, highest-quality seeds make it to your front door.

Variants

• 1.6 Gram Packet (~150 Seeds): Perfect for small garden accent clusters, localized backyard patches, or adding a massive splash of color to a couple of raised beds.

• 1 oz Pouch (~2,600 Seeds): Great for long garden borders, lining deep fence pathways, or turning a dedicated backyard plot into a dense, cut-flower sanctuary.

• 1 lb Bulk Sack (~41,000 Seeds): Ideal for commercial market growers, community farm projects, seed-saving libraries, and expansive flower field layouts.

Quick Growing Facts

• Plant Type: Tall, Robust Hardy Annual Flower

• Mature Height: 36 to 48 inches

• Plant Spread: 12 to 18 inches

• Days to Bloom: 60 to 75 days

• Sunlight Requirements: Full Sun (Absolutely essential for massive blossoms and strong, rigid stems)

• Hardiness Zones: 2 through 11 (Thrives easily as a sun-loving summer annual across the entire United States)

Planting & Care Guide

• When to Plant: Direct-sow seeds outdoors directly into the warm soil after all danger of spring frost has passed and soil temperatures have warmed completely. Zinnias have sensitive roots and grow so rapidly from seed that they thrive best when planted directly into their permanent home. For regions with very short growing seasons, you can start them indoors in biodegradable peat pots 3–4 weeks before the final frost.

• Seeding Depth: 1/4 inch deep. Cover lightly with soil and press down gently with your fingers. Zinnias need a dark, warm soil environment to pop up successfully, typically sprouting in just 3 to 7 days!

• Spacing: Thin or space individual plants about 12 to 18 inches apart. Giving these large, bushy giants plenty of space ensures excellent air circulation around their leaves, which keeps the plants healthy and robust all season.

• Watering: Maintain consistent moisture while seeds are germinating. Once established, water moderately. Zinnias are remarkably resilient and handle summer heat beautifully, preferring a deep watering at the base of the plant once or twice a week. Always water early in the morning directly at the soil level—avoiding overhead spraying keeps the large green leaves dry and pristine.

• Pro Gardening Tip: Pinch for maximum bushiness and cut aggressively for endless blooms! When your young zinnia seedlings reach about 12 inches tall, use sharp garden snips to pinch off the very top central bud. This simple trick signals the plant to stop growing straight up and instead forces it to branch out into a wide, sturdy, multi-stemmed bush loaded with double the flower buds. Once they start blooming, cut the stems constantly for fresh indoor bouquets—your plants will continuously respond by pushing out fresh, massive flowers until winter arrives!

Why You'll Love It

• Colossal, Show-Stopping Blooms: Spanning up to 5 inches wide with stacked, layered petals, these giant blossoms create a jaw-dropping, high-impact visual display that can be seen from across the yard.

• Exceptional Heat & Drought Tolerance: True champions of the summer heatwave, California Giants thrive in scorching mid-summer sun and handle dry spells with absolute ease where delicate flowers wither.

• The Sovereign of Cutting Gardens: Featuring exceptionally long, straight, and rigid stems combined with an incredible vase life, a small patch gives your home a non-stop supply of vibrant, professional-grade floral arrangements for months.

• An Absolute Pollinator Magnet: The massive, bright flower heads act as an immediate landing pad for honeybees, native bumblebees, and beneficial butterflies, making your garden the most popular spot in the neighborhood.