Growing Sunflower in London
🇬🇧 Zone 7 Planting Guide · Oceanic / Marine west coast climate
Quick Answer: Growing Sunflower in London
Yes, you can grow Sunflower in London, GB! Plant during Mar, Apr, May, Jun for best results. London is in USDA Zone 7 with a Oceanic / Marine west coast climate, offering 270 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
London's climate requires careful timing. Winter lows (2°C) drop below Sunflower's minimum (8°C), so avoid cold months. Follow the recommended planting months for success.
London Climate Data
Sunflower Planting Calendar for London
Green months show the best time to plant Sunflower in London
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 London.
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 London
London, GB is in USDA Hardiness Zone 7 with a Oceanic / Marine west coast climate (Köppen Cfb). With winter lows of 2°C and summer highs of 23°C, the growing season spans approximately 270 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 London, the best months to plant Sunflower are March, April, May, June. 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 602mm of annual rainfall, London provides moderate natural moisture. This should be adequate for Sunflower's water needs.
Other Plants That Grow in London
More plants you can grow alongside Sunflower in London
Keep Exploring
Frequently Asked Questions
Can I grow sunflower in London?
Yes! Sunflower can be successfully grown in London, GB. London is in USDA Hardiness Zone 7 with a Oceanic / Marine west coast climate. The difficulty level for growing Sunflower here is rated "easy". The best months to plant are March, April, May, June.
When should I plant sunflower in London?
In London, the recommended planting months for Sunflower are March, April, May, June. London has 270 frost-free days per year, with winter lows of 2°C and summer highs of 23°C. Since Sunflower is not frost tolerant, make sure to plant after the last frost date.
How long does sunflower take to grow in London?
Sunflower typically takes 70-100 days from planting to harvest. In London's Oceanic / Marine west coast climate with 270 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 London?
Sunflower can potentially be grown indoors in London 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 Mar, Apr, May, Jun outdoor planting window. Use containers with good drainage and moderate watering.
What month do I plant sunflower in London?
Plant Sunflower in London during March, April, May, June. These are the optimal months based on London's USDA Zone 7 climate, 270 frost-free days, and temperature range of 2°C to 23°C.
Is sunflower hard to grow in London?
Sunflower is rated "easy" to grow in London. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Sunflower in London is Moderate.
What grows well with sunflower in London?
In London, 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 London's Zone 7 climate.
Does sunflower need full sun in London?
Sunflower requires full sun. In London, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.