When does Helianthus giganteus bloom?

Indian-potato typically flowers from July through September, producing clusters of bright yellow blooms atop tall stems.

What pollinators visit Indian-potato flowers?

Bees, butterflies, and beetles commonly visit Helianthus giganteus for nectar and pollen during its summer bloom period.

How much water does Helianthus giganteus need?

This species grows best in medium to consistently moist soil and is often found along wet meadows, ditches, and low prairie edges.

How tall does Indian-potato grow?

Helianthus giganteus is one of the taller sunflower species, frequently reaching six to twelve feet under good growing conditions.

What growing conditions suit this plant best?

Full sun paired with medium to wet soil, such as in open meadows or moist prairie sites, gives this forb its strongest growth and bloom.

Is Indian-potato HOA-friendly?

Indian-potato takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Indian-potato

Name: Pollinator Patch
Author: Pollinator Patch

Helianthus giganteus

Last reviewed: August 2026

Helianthus giganteus, or Indian-potato, is a tall forb found in wet meadows and moist prairies across the eastern and midwestern United States, blooming yellow from July through September in full sun and medium to wet soil.

Toxicity unknown

Indian-potato (Helianthus giganteus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

medium

Size

36"–96" H × 12"–24" W

Bloom

Jul, Aug, Sep

Native to

CT, DE, GA, IA and 21 more states

Pollinators

bees, butterflies, beetles

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Indian-potato is a tall native sunflower that produces bright yellow blooms from summer into early fall. This perennial spreads slowly to form colonies and can reach up to 8 feet tall, making it an impressive backdrop plant. The flowers attract numerous pollinators and provide seeds for birds in autumn.

Growing Indian-potato

Grow Indian-potato in full sun and medium water. Mature plants reach 36 to 96 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Indian-potato takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Extremely tall height appears wild and unmanaged
Can look weedy when dormant
Spreading habit may appear unkempt

Wildlife value

Supports bees, butterflies, and beetles with nectar and pollen throughout its long blooming period. Seeds provide important food for goldfinches and other birds in fall and winter.

Common questions

When does Helianthus giganteus bloom?: Indian-potato typically flowers from July through September, producing clusters of bright yellow blooms atop tall stems.
What pollinators visit Indian-potato flowers?: Bees, butterflies, and beetles commonly visit Helianthus giganteus for nectar and pollen during its summer bloom period.
How much water does Helianthus giganteus need?: This species grows best in medium to consistently moist soil and is often found along wet meadows, ditches, and low prairie edges.
How tall does Indian-potato grow?: Helianthus giganteus is one of the taller sunflower species, frequently reaching six to twelve feet under good growing conditions.
What growing conditions suit this plant best?: Full sun paired with medium to wet soil, such as in open meadows or moist prairie sites, gives this forb its strongest growth and bloom.
Is Indian-potato HOA-friendly?: Indian-potato takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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