Growing Green Onion in London
🇬🇧 Zone 7 Planting Guide · Oceanic / Marine west coast climate
Quick Answer: Growing Green Onion in London
Yes, you can grow Green Onion in London, GB! Plant during Jan, Feb, Mar, Sep, Oct 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 Green Onion takes 20-30 days to harvest. Green Onion needs full sun and regular watering.
Climate Match Analysis
London's temperatures (2°C to 23°C) are within the tolerable range for Green Onion (-2°C to 28°C), though not always in the optimal zone (10°C to 22°C). Plant during recommended months for best results.
London Climate Data
Green Onion Planting Calendar for London
Green months show the best time to plant Green Onion in London
Green Onion Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
20-30
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Green Onion
Can regrow from store-bought roots in water. Succession plant every 2 weeks. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Green Onion is frost tolerant — you can plant earlier in spring.
How to Grow Green Onion 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. Green Onion is one of the easiest plants to grow in this climate.
Green Onion thrives in temperatures between 10°C and 22°C, requiring full sun and regular watering. In London, the best months to plant Green Onion are January, February, March, September, October. Since Green Onion can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 20-30 days after planting.
With 602mm of annual rainfall, London provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.
Other Plants That Grow in London
More plants you can grow alongside Green Onion in London
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Frequently Asked Questions
Can I grow green onion in London?
Yes! Green Onion 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 Green Onion here is rated "easy". The best months to plant are January, February, March, September, October.
When should I plant green onion in London?
In London, the recommended planting months for Green Onion are January, February, March, September, October. London has 270 frost-free days per year, with winter lows of 2°C and summer highs of 23°C. Green Onion is frost tolerant, giving you more flexibility with planting dates.
How long does green onion take to grow in London?
Green Onion typically takes 20-30 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 Green Onion to maturity. Can regrow from store-bought roots in water. Succession plant every 2 weeks. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Can I grow green onion indoors in London?
Green Onion 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 Jan, Feb, Mar, Sep, Oct outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant green onion in London?
Plant Green Onion in London during January, February, March, September, October. 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 green onion hard to grow in London?
Green Onion 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 Green Onion in London is Good.
What grows well with green onion in London?
In London, you can grow many companion plants alongside Green Onion. 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 green onion need full sun in London?
Green Onion requires full sun. In London, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.