Person holding a vibrant bouquet of multicolored California Giants zinnia flowers in a garden.
Child holding a vibrant bouquet of multicolored California Giants zinnia flowers in a garden.
Close-up of a vibrant, fully double California Giants zinnia flower in a soft rose-pink shade against green foliage.
Vibrant pink California Giants zinnia flower with a yellow center blooming against a soft green garden background.
A single lavender California Giant zinnia bloom with a yellow center against a blurred green garden background.
A vibrant pink California Giants zinnia bloom with layered petals against a soft-focus green garden background.
Vibrant scarlet California Giants zinnia flower with a yellow center blooming against a soft green garden background.
Bright orange California Giants zinnia flower in full bloom with a blurred purple zinnia in the background.

California Giants - Zinnia Seeds

$3.95
Open-Pollinated
Heirloom
Quick Facts
  • Fully double blooms in a bright, generous color mix
  • Long stems make abundant garden-grown bouquets
  • Regular cutting encourages more flowers for summer picking
  • 75–90 days from sowing to bloom
  • Zinnia elegans
Choose size

🌱 Sow with Confidence—One-Year Seed Guarantee

California Giants zinnias live up to their name with tall, sturdy plants and large, fully double blooms on strong cutting stems. The mix brings bright shades of rose, orange, lavender, yellow, white, and scarlet, lighting up the summer row with color that bees and butterflies notice.

Long stems make them a favorite for cutting, and the more you harvest, the more the plants keep pushing new flowers. This is a classic zinnia for big bouquets, cheerful borders, and that generous, overflowing look every flower garden deserves.

Orders ship from Pennsylvania within 1–2 business days via USPS. Orders $79+ ship free within the contiguous United States.

Unopened items may be returned within 30 days. If something arrives damaged, incomplete, or incorrect, we’ll make it right.

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We stand behind every packet. Our seeds are untreated, germination-tested, true to variety, and covered for one year from purchase.

If seeds arrive damaged, fail to germinate under reasonable growing conditions, or do not grow true to type, contact us and we’ll make it right with a replacement, store credit, or refund.

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FAMILY OWNED

Hand packed in Pennsylvania by our family.

LAB TESTED

Third-party tested for reliable germination.

NON-GMO

Open-pollinated varieties for home gardens & seed saving.

UNTREATED SEED

Never coated with chemical seed treatments.

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Zinnia Growing Basics

Zinnias are among the easiest and most rewarding flowers to grow from seed, producing an abundance of colorful blooms from summer until frost. Native to Mexico and the American Southwest, these warm-season annuals thrive in heat and sunshine, making them favorites for cutting gardens, pollinator plantings, and home landscapes.

Available in nearly every color, zinnias range from compact bedding plants to tall cutting varieties with single, semi-double, and fully double blooms. Their long flowering season and exceptional vase life make them one of the most productive flowers for both beginning and experienced gardeners.

Direct sow zinnias after all danger of frost has passed and the soil has warmed. They germinate quickly in warm conditions and establish rapidly, making direct sowing the preferred method for most gardens.

For earlier blooms, seeds may be started indoors about 3–4 weeks before the last expected frost and transplanted carefully after hardening off. Successive sowings every two to three weeks through early summer provide continuous flowers until frost.

Sow seeds about ¼ inch deep in well-prepared soil and keep evenly moist until seedlings emerge, usually within one week under warm conditions.

Thin or transplant seedlings according to the mature size of the variety, generally allowing 8–12 inches between plants. Good spacing improves airflow, encourages sturdy branching, and helps reduce disease pressure later in the season.

Plant zinnias in full sun and fertile, well-drained soil. They flourish during warm weather and bloom most heavily with at least six to eight hours of direct sunlight each day.

Water regularly while plants establish, then deeply during prolonged dry periods. Water near the base of the plant whenever possible, keeping foliage dry to reduce disease. Tall varieties may benefit from support in windy locations.

Pinching young plants when they reach about 8–12 inches tall encourages branching, resulting in more flowering stems and a longer harvest season. Frequent harvesting or deadheading keeps plants producing new blooms until frost.

Zinnias are outstanding pollinator flowers, attracting native bees, honeybees, butterflies, hoverflies, and many other beneficial insects throughout summer.

Harvest zinnias once the stems are fully mature using the “wiggle test.” Hold the stem several inches below the flower and gently shake it. If the stem remains stiff and upright, it is ready to cut. If it bends easily beneath the flower, allow it to mature for a few more days.

Harvest during the cool part of the day and immediately place stems into clean water. Regular harvesting encourages plants to branch and continue producing flowers throughout the season.

Full Zinnia Growing Guide