Skyscraper Sunflower (Helianthus annuus) Seeds – Towering 12-15 Foot Plants, Giant 14" Blooms, Large Edible Seeds for Roasting

Minimum: 20+ Seeds

Skyscraper Sunflower Seeds (Helianthus annuus) — The 12-15 Foot Giant With Seeds Worth Roasting

Skyscraper Sunflower is the variety that makes children stop walking and adults stop talking: a genuinely massive, record-seeking single-stemmed sunflower that routinely reaches 12 to 15 feet tall and crowns itself with flower heads up to 14 inches across, the kind of scale that turns an ordinary backyard into something genuinely astonishing. This is not a branching, multi-flower ornamental... it's a single commanding tower, one stem, one massive head, one statement. The yellow petals surrounding the enormous central disc create the archetypal sunflower at its most maximalist: vivid, big, unambiguous. Skyscraper earns its place in both the ornamental and edible garden: the enormous flower head backs up its visual promise with large, substantial seeds... the kind that fill your hand when you shell them, the kind that actually taste like something when roasted with a little oil and salt. Growing a Skyscraper takes nothing more than full sun, consistent water, and patience: direct sow after last frost, step back, and let it race toward the sky.

Who Grows Skyscraper Sunflower Seeds?

Gardeners who want to grow the tallest thing on the block. Families with children who need to see what 14 feet of sunflower actually looks like. Edible gardeners wanting genuinely large, roast-worthy seeds. Anyone creating a privacy barrier that also happens to be spectacular. Back-of-border landscapers wanting maximum height and impact.

What This Giant Single-Stem Sunflower Actually Is

Helianthus annuus 'Skyscraper'. Giant, single-stemmed heirloom sunflower. Warm-season annual. Grows single, sturdy, thick stem reaching 12-15 feet tall... among the tallest sunflower varieties available. Produces single enormous flower head 14 inches or more across at maturity. Classic yellow petals surrounding large central disc. Strong stems resist wind despite exceptional height. Produces large, substantial edible seeds ideal for roasting. Matures 70-90 days from direct sow. Full sun essential. One stem, one giant head.

In the Garden & Kitchen

• Maximum Height: Reaches 12-15 feet for genuine garden spectacle.
• Giant Blooms: 14-inch flower heads create dramatic single focal points.
• Roasting Seeds: Large, meaty seeds ideal for homegrown roasted sunflower seeds.
• Privacy Screen: Single-season living wall towering over most fences.
• Bird Feeding: Mature seed heads become natural bird feeders in fall.
• Children's Gardens: Unmatched for teaching scale and growth.
• Cut Flower: Single giant heads create dramatic floral arrangements.
• Seed Saving: Large seeds easy to harvest, process, and save.

Growing Skyscraper Sunflower Seeds

• Start: Direct sow outdoors after last frost, 1 inch deep.
• Soil Temperature: 55°F minimum, 65-75°F optimal.
• Germination: 7-10 days in warm soil.
• Spacing: 24-36 inches between plants.
• Sunlight: Full sun essential, 6-8+ hours minimum.
• Soil: Deep, well-drained, moderately fertile.
• Water: Consistent, deep watering... plants are thirsty at this scale.
• Fertilizing: Heavy feeder; responds to rich soil and feeding.
• Support: Stake stems in exposed locations for wind resistance.
• Maturity: 70-90 days to bloom from direct sow.
• Seed Harvest: Cut heads when backs turn yellow-brown; dry seeds thoroughly.
• Zones: Warm-season annual, all USDA zones.

Before You Close This Page

Skyscraper Sunflower, giant single-stemmed heirloom, 12-15 feet tall. One stem, one enormous 14-inch flower head. Classic vivid yellow petals. Large, meaty edible seeds ideal for roasting. Natural bird feeder in fall. Maximum height for maximum garden spectacle. Full sun, consistent water, deep fertile soil. 70-90 days to bloom. The sunflower that makes everything around it look small.