False Sunflower plant profile
Heliopsis helianthoides
A perennial flower for full sun.
Last updated .
When to plant
When to plant False Sunflower
False sunflower is an easy native perennial. NC State says propagation is easily done by planting seeds in the fall or early spring, so set plants out in spring or fall. It thrives in full sun and weakens with weaker stems if planted in shade.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open False Sunflower in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Hardiness
- Zones 3a to 9bFind my hardiness zone
Common problems
Watch for these
Also watch for: flopping sprawling stems.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Heliopsis helianthoides (False Sunflower, Oxeye Sunflower, Smooth Oxeye)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.