• Single stem (estimated)
  • Annual
  • Yellow
  • Single

American Giant

American Giant Hybrid · American Giant F1

Annual single stem sunflower in yellow, blooming in early summer, midsummer, and late summer. Single yellow flower heads about 10 inches across on thick stalks 8 to 16 feet tall. Grown as an annual in every zone.

Single source · Values marked like this (estimated) are estimates.

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A American Giant sunflower flower up close on the plant
A American Giant sunflower flower up close on the plant

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American Giant sunflower plants in bloom in a garden
American Giant sunflower plants in bloom in a garden

At a glance

Flower form
Single stem (estimated) Single · 10 in (25 cm)
Colors
  • Yellow
Blooms
Early summer, Midsummer, Late summer 65–75 days from sowing
Vase life
Not grown for cutting
Height
8–16 ft (244–488 cm)
Sunlight
Full sun
Hardiness
Grown as an annual in every zone Annual
Planted as
Seed
Botanical name
Helianthus annuus

In the garden

  • Bees
  • Butterflies
  • Occasionally severely damaged by deer (Rutgers rating)

Find your frost dates and zone by ZIP code

Origin

F1 hybrid giant sunflower sold for its height and stalks that seed sellers describe as less likely to fall over in wind or rain than older giant types.

Sources

Where to buy

Prices rechecked daily
  • Gurney'sSeeds

    Pack size not listed

    Check availability

    $2.99Checked Oct 14, 2026
  • Territorial Seed CompanySeeds

    SEED / 1 gram

    Check availability

    $3.35Checked Oct 14, 2026
  • Harris SeedsSeeds

    RAW / 50 seeds / UNTREATED

    Check availability

    $5.37Checked Oct 14, 2026
  • Swallowtail Garden SeedsSeeds

    Pack size not listed

    Check availability

    Check price at shop

We may earn a commission when you buy through these links. Your price stays the same. Prices checked Oct 14, 2026.

All photos

  • A American Giant sunflower flower up close on the plant
    A American Giant sunflower flower up close on the plant
  • American Giant sunflower plants in bloom in a garden
    American Giant sunflower plants in bloom in a garden

Questions

Is American Giant hardy in my zone?

American Giant is an annual: it flowers and sets seed in one season, so hardiness zone decides when to plant it, not whether it survives winter.

Does American Giant need full sun?

American Giant grows in full sun.

When does American Giant bloom?

American Giant blooms in early summer, midsummer, and late summer, about 65–75 days from sowing.

Is American Giant good for cutting?

Our sources don't list American Giant as a cut flower or give a vase life for it.

See also

See all →
A ProCut Lemon Lite sunflower flower up close on the plant ProCut Lemon Lite Pollenless single-stem cut sunflower with pale lemon-yellow 4 to 6 inch flowers, 50 to 60 days. Single stemMidsummerMedium height
A ProCut Orange sunflower flower up close on the plant ProCut Orange Pollenless single-stem cut sunflower with 4 to 6 inch orange flowers, 50 to 60 days. Single stemEarly summerMedium height
A ProCut Orange DMR sunflower flower up close on the plant ProCut Orange DMR Downy mildew resistant ProCut orange sunflower, pollenless and single-stem, 52 to 62 days. Single stemMidsummerMedium height
A ProCut Orange Excel sunflower flower up close on the plant ProCut Orange Excel Early pollenless single-stem cut sunflower with 4 to 6 inch orange flowers, 50 to 55 days. Single stemMidsummerMedium height

Same colors

See all →
A Kong sunflower flower up close on the plant Kong F1 hybrid giant sunflower 13 to 14 feet tall, branching, with heads up to 10 inches golden yellow heads. BranchingEarly summerTall
A Lemon Queen sunflower flower up close on the plant Lemon Queen Branching sunflower 5 to 7 feet tall with lemon yellow flowers and brown centers. BranchingEarly summerMedium height
A Skyscraper sunflower flower up close on the plant Skyscraper Single-stem giant sunflower, 10 to 12 feet tall with 14-inch yellow heads. Single stemEarly summerTall
A Strawberry Blonde sunflower flower up close on the plant Strawberry Blonde Pollenless F1 branching sunflower, burgundy to pink petals with lemon tips. BranchingMidsummerMedium height

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