Species
Helianthus annuusCommon Sunflower15 other cultivars
‘Table Mountain’Table Mountain Sunflower
‘White Lite’White Lite Sunflower
‘Mammoth’Mammoth Sunflower
‘Big Bear’Big Bear Sunflower
‘Autumn Gold’Sunflower Autumn Gold
‘Lemon Queen’Lemon Queen Sunflower
‘Delta Sunflower’Delta Sunflower
‘Happy Days’Happy Days Sunflower
‘Japanese Silver-Leaf’Japanese Silver-Leaf Sunflower
‘Aura Gold’Aura Gold Sunflower
‘Ring of Fire’Ring of Fire Sunflower
‘Red Courtesan’Red Courtesan Sunflower
‘Arikara’Arikara sunflower
‘Starter Garden’Starter Garden Common Sunflower
‘Italian White’Italian White Sunflower
The Story
Plant Bio
Helianthus annuus 'Flore Pleno' is a tall, annual sunflower with bushy growth, featuring large, fully double yellow flowers and broad, rough-textured leaves that create a striking display in summer and autumn.
This cultivar is distinguished by its fully double, pom-pom-like flowers that provide a more ornamental appearance, making it especially popular for cut flowers and decorative borders.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Annual
Height
72 inches
Width
24 inches
Light
Full Sun
Zones
10
Water
Moderate
Humidity
Average
Lifespan
Annual
Native To
North America
Toxicity
Non-toxic
Bloom period
Mid-summer – Late summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck seeds 1 inch deep in well-draining soil in full sun.
- Keep soil moist until germination, about 7-10 days.
- Thin seedlings to 18 inches apart once established.
- Water regularly during dry spells for optimal growth.
- Stake tall varieties to prevent wind damage.
- Deadhead spent flowers to encourage more blooms.
Pro Tip
Plant after last frost for best summer display and ensure full sun exposure.
Keep It Thriving
Care Guide
Do
- Water deeply once a week 🌱
- Deadhead to prolong flowering
- Provide support for tall stems
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t disturb roots during flowering
- Refrain from fertilizing with high nitrogen in late season
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Harvest | ||||||||||||
| Plant | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Double-Flowered Sunflower questions
What zones can Double-Flowered Sunflower grow in?
Double-Flowered Sunflower is hardy in USDA Zone 10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Double-Flowered Sunflower deer resistant?
Not reliably. Deer may browse Double-Flowered Sunflower, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Double-Flowered Sunflower bloom?
Double-Flowered Sunflower typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Double-Flowered Sunflower need full sun?
Double-Flowered Sunflower does best in full sun (6+ hours).
Is Double-Flowered Sunflower drought tolerant?
Yes — once established (usually after the first full season), Double-Flowered Sunflower handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Helianthus to compare
Swamp Sunflower
Helianthus angustifolius 'First Light'
Maximilian sunflower
Helianthus maximiliani
Narrow-Leaf Sunflower Low Down
Helianthus angustifolius 'Low Down'
Bolander's Sunflower
Helianthus bolanderi
Salicifolius Sunflower Willowleaf Sunflower
Helianthus salicifolius
Table Mountain Sunflower
Helianthus annuus 'Table Mountain'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Double-Flowered Sunflower with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.