Giant Sunflower
Sunzilla Sunflower is a towering annual that reaches 10 to 16 feet tall, making it one of the most dramatic additions to any garden. These giants thrive in full sun and demand consistent moisture to fuel their incredible vertical growth. With proper spacing and early starting indoors, you'll grow sunflowers that command attention from every angle.
Full Sun
High
?-?
192in H x ?in W
Perennial
Moderate
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Sunzilla produces massive plants that can stretch well beyond typical sunflower heights, reaching up to 16 feet under ideal conditions. These are not delicate flowers, they're architectural statements that require room to develop fully and plenty of water to support their ambitious growth. The key to success is spacing them generously and starting seeds indoors several weeks before your last frost, then transplanting with minimal root disturbance.
Several weeks before your last frost date, sow seeds 1 inch deep in individual pots filled with well-drained seed starting mix. Keep the soil consistently moist and provide a strong light source until seedlings are ready for outdoor planting. This early start gives Sunzilla time to establish a strong root system before transplanting.
When seedlings are about 3 inches tall, transplant them outdoors spacing them 12 to 18 inches apart with 3 feet between rows. Handle seedlings carefully, disturbing the roots as little as possible. Plant after your last frost date when soil has warmed and frost danger has completely passed.
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