Close up of a Titan Sunflower on a white background.
Titan Sunflower Smiley face is held by a gardener over his face.
Single Titan Sunflower as seen from below on a white background.
Titan Sunflower seeds and a full head are in the background on a wooden table.
Close up of a Titan Sunflower on a white background.
Titan Sunflower Smiley face is held by a gardener over his face.
Single Titan Sunflower as seen from below on a white background.
Titan Sunflower seeds and a full head are in the background on a wooden table.

Sunflower Seeds,
Titan

4.521 ReviewsSKU: #FL749Min. seed count: 25
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Description

(Helianthus annuus). Massive, record-setting flower heads have reached a fantastic 24 inches across in some areas. One of the largest you can grow, it also produces lots of really big seeds. Fun for the kids and adults as well.

Growing Tips: The Titan sunflower grows best in full sun and needs well-draining soil enriched with organic matter to support its quick growth. The soil should be moderately moist; however, avoid soggy soil, as this can cause root issues.

Plant Details

Botanical Name
Helianthus annuus
Life Cycle
Annual
Sun Requirement
8–12 hr.
Days to Germinate
7–14
Days to Maturity
90–110
Planting Depth
½ in.
Plant Spacing
18–24 in.
Ideal Temperature
65–75°F
Frost Hardy
No

When to Grow

Plant Titan sunflowers outdoors after the last frost in spring, once the soil temperature consistently exceeds 60 F. In cooler climates, seeds can be started indoors about 2-3 weeks before the last frost and transplanted once the risk of frost has passed. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Sow seeds directly into the ground about 1/2 inch deep, spacing them 18-24 inches apart to accommodate their large size. Titan sunflowers germinate in 7-14 days. Since they develop deep taproots, direct sowing is recommended to minimize root disturbance​.

How to Grow

These sunflowers need at least 8-12 hours of direct sunlight daily and regular, deep watering. Given their size, Titan sunflowers are heavy feeders so you can use balanced fertilizer once a month, with added phosphorus to support root and flower development. Due to their height and large blooms, staking or planting near a windbreak can help prevent them from toppling over.

How to Save Seeds

  • When petals die back and heads begin to dry and turn brown, place a paper bag over the heads to protect seeds from birds.
  • After a few days, the heads will dry to a dark brown. Bring the heads indoors and hang them upside down in a dry area in direct sunlight for up to a week, shaking seeds free each day.
  • Store seeds in a cool, dark, dry place.

FAQ

How long does it take Titan sunflowers to reach maturity?

They generally take between 90 and 110 days to fully mature and produce seeds, with blooming typically in mid to late summer.

Are Titan sunflowers suitable for container planting?

Due to their large root systems and height, they are best suited for in-ground planting where they have plenty of space to grow.

Do Titan sunflowers require staking?

Yes, especially in windy areas, due to their height and heavy flower heads. Planting them along a fence or using sturdy stakes can provide the needed support.

Browse our full range of sunflower seeds.

Customer reviews

4.5 / 5 21 Reviews

What gardeners are saying

  • Truly giant: Stalks reach 8 to 14 feet with heads over a foot across.

  • Easy to start: Near-complete germination, direct sown or transplanted.

  • Birds and bees: Pollinators work the heads; birds feast on the seeds.

  • Growing tips: Heavy heads topple in wind; stake or tie them as they grow.

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