Helianthus decapetalus

Also called Ten-Petaled Sunflower

Yellow petals surround a yellowish-brown central disk
Dark green leaves with serrated edges
Foliage hangs from hairy reddish-green stems
Good cut flower
Attracts birds
Bloom Time: Late summer to mid-fall
Flower Size: 7.5 cm

ZONE:
4

COLOUR:
Yellow

HEIGHT:
125-150 cm

SPREAD:
80-100 cm

Currently Unavailable

Substitutions Are Available

Growing and Maintenance Tips:

Grow in partial sun or dappled sunlight, moist to average conditions, and a rich loamy soil. Naturalizes aggressively by seed and rhizome. Flowering is more prolific in long hot summers.

Additional Notes about Thinleaf Sunflower:

Native to Ontario

Larval host to moths and butterflies, including the Silvery Checkerspot. The flowers provide late-season pollen and nectar for a range of butterflies, wasps, and bees, including at least 6 specialist bee species. The seeds are enjoyed by small birds.