Maximilian Sunflower plant profile
Helianthus maximiliani
A perennial flower for full sun.
Last updated .
When to plant
When to plant Maximilian Sunflower
Maximilian sunflower is a perennial easily grown from seed or by division, blooming in summer and fall (NC State). The page gives no explicit sowing date, so a spring planting band is approximate.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Maximilian Sunflower in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Spacing
- 12 to 36 in apart
- Hardiness
- Zones 4 to 9Find my hardiness zone
Common problems
Watch for these
Also watch for: aggressive spreading, flopping.
Next steps
Continue with Maximilian Sunflower
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Helianthus maximiliani (Maximilian Sunflower)
NC State Extension, North Carolina Extension Gardener Plant Toolbox. Supports general reference. Checked 2026-06-18.