Growing Sunflower in Oklahoma City
🇺🇸 Zone 5 Planting Guide · Humid subtropical climate
Quick Answer: Growing Sunflower in Oklahoma City
Yes, you can grow Sunflower in Oklahoma City, US! Plant during Apr, May, Jun, Jul for best results. Oklahoma City is in USDA Zone 5 with a Humid subtropical climate, offering 215 frost-free days per year. The difficulty level is easy, and Sunflower takes 70-100 days to harvest. Sunflower needs full sun and moderate watering.
Climate Match Analysis
Oklahoma City's climate requires careful timing. Winter lows (-4°C) drop below Sunflower's minimum (8°C), so avoid cold months. Follow the recommended planting months for success.
Oklahoma City Climate Data
Sunflower Planting Calendar for Oklahoma City
Green months show the best time to plant Sunflower in Oklahoma City
Sunflower Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Moderate
Keep soil consistently moist
Days to Harvest
70-100
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Sunflower
Sow directly -- taproots don't transplant well. Great for kids to grow. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.
Frost tolerance: Sunflower is NOT frost tolerant — wait until after the last frost in Oklahoma City.
Companion Plants for Sunflower
Find out which plants grow best alongside Sunflower — and which to keep apart
Grow Sunflower Indoors
No garden? Learn how to grow Sunflower indoors with our complete guide
How to Grow Sunflower in Oklahoma City
Oklahoma City, US is in USDA Hardiness Zone 5 with a Humid subtropical climate (Köppen Cfa). With winter lows of -4°C and summer highs of 34°C, the growing season spans approximately 215 frost-free days. Sunflower is one of the easiest plants to grow in this climate.
Sunflower thrives in temperatures between 18°C and 28°C, requiring full sun and moderate watering. In Oklahoma City, the best months to plant Sunflower are April, May, June, July. Sunflower is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 70-100 days after planting.
With 930mm of annual rainfall, Oklahoma City provides moderate natural moisture. This should be adequate for Sunflower's water needs.
Other Plants That Grow in Oklahoma City
More plants you can grow alongside Sunflower in Oklahoma City
Keep Exploring
Frequently Asked Questions
Can I grow sunflower in Oklahoma City?
Yes! Sunflower can be successfully grown in Oklahoma City, US. Oklahoma City is in USDA Hardiness Zone 5 with a Humid subtropical climate. The difficulty level for growing Sunflower here is rated "easy". The best months to plant are April, May, June, July.
When should I plant sunflower in Oklahoma City?
In Oklahoma City, the recommended planting months for Sunflower are April, May, June, July. Oklahoma City has 215 frost-free days per year, with winter lows of -4°C and summer highs of 34°C. Since Sunflower is not frost tolerant, make sure to plant after the last frost date.
How long does sunflower take to grow in Oklahoma City?
Sunflower typically takes 70-100 days from planting to harvest. In Oklahoma City's Humid subtropical climate with 215 frost-free days, you have plenty of time to grow Sunflower to maturity. Sow directly -- taproots don't transplant well. Great for kids to grow. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.
Can I grow sunflower indoors in Oklahoma City?
Sunflower can potentially be grown indoors in Oklahoma City with proper conditions. It requires full sun (6+ hours of direct light — a south-facing window or grow lights recommended). Indoor growing extends your season beyond the Apr, May, Jun, Jul outdoor planting window. Use containers with good drainage and moderate watering.
What month do I plant sunflower in Oklahoma City?
Plant Sunflower in Oklahoma City during April, May, June, July. These are the optimal months based on Oklahoma City's USDA Zone 5 climate, 215 frost-free days, and temperature range of -4°C to 34°C.
Is sunflower hard to grow in Oklahoma City?
Sunflower is rated "easy" to grow in Oklahoma City. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Sunflower in Oklahoma City is Moderate.
What grows well with sunflower in Oklahoma City?
In Oklahoma City, you can grow many companion plants alongside Sunflower. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Oklahoma City's Zone 5 climate.
Does sunflower need full sun in Oklahoma City?
Sunflower requires full sun. In Oklahoma City, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.