Basics

Ease of Growing
Easy
Grown as
Annual
Days to Maturity
60-75 (Spring/Summer), 90-110 (Fall/Winter)
Growing Habit
-
Hardiness
Half Hardy

Sunflowers will tolerate light frost.

Crops
Spring Transplant, Spring, Summer
Growing Season
Short, Long
Cultivar Type
-
Growing Conditions
Warm, Hot

Adaptable to various soil types. They prefer full sun (though they will tolerate light shade). The taller varieties need shelter from the wind and should be placed where they won't cast unwanted shade on other plants.

Outdoor Growing Temp
55°F - 95°F
Min Outdoor Soil Temp
50°F

Don't plant out until the soil is at least 50˚ F (and preferably 60˚ F).

Start Indoors
Yes
Start Outdoors
Yes
Light
Water
Moderate

Sunflowers are thirsty plants and for maximum production they need a constant supply of water.

Feeder
Heavy

Low nitrogen. High phosphorus. High potassium. Sunflowers like phosphorus and potassium, but not too much nitrogen as it may encourage leaf growth rather than flowering.

Suitability
High heat
Small Gardens?
Yes
Containers?
No
-
Attracts beneficial insects?
Yes
Color
Orange
Fruit Size
3.0-3.5"
Plant Height
48.0-60.0"
Plant Diameter
12.0-18.0"
Hardiness Zone
3-10
Disease Resistance
-
Taste Profile
-