Growing Green Onion in Johannesburg
🇿🇦 Zone 7 Planting Guide · Subtropical highland climate
Quick Answer: Growing Green Onion in Johannesburg
Yes, you can grow Green Onion in Johannesburg, ZA! Plant during Apr, May, Jun, Jul, Aug for best results. Johannesburg is in USDA Zone 7 with a Subtropical highland climate, offering 290 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
Johannesburg's temperatures (4°C to 26°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.
Johannesburg Climate Data
Green Onion Planting Calendar for Johannesburg
Green months show the best time to plant Green Onion in Johannesburg
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 Johannesburg
Johannesburg, ZA is in USDA Hardiness Zone 7 with a Subtropical highland climate (Köppen Cwb). With winter lows of 4°C and summer highs of 26°C, the growing season spans approximately 290 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 Johannesburg, the best months to plant Green Onion are April, May, June, July, August. 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 713mm of annual rainfall, Johannesburg provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.
Other Plants That Grow in Johannesburg
More plants you can grow alongside Green Onion in Johannesburg
Keep Exploring
Frequently Asked Questions
Can I grow green onion in Johannesburg?
Yes! Green Onion can be successfully grown in Johannesburg, ZA. Johannesburg is in USDA Hardiness Zone 7 with a Subtropical highland climate. The difficulty level for growing Green Onion here is rated "easy". The best months to plant are April, May, June, July, August.
When should I plant green onion in Johannesburg?
In Johannesburg, the recommended planting months for Green Onion are April, May, June, July, August. Johannesburg has 290 frost-free days per year, with winter lows of 4°C and summer highs of 26°C. Green Onion is frost tolerant, giving you more flexibility with planting dates.
How long does green onion take to grow in Johannesburg?
Green Onion typically takes 20-30 days from planting to harvest. In Johannesburg's Subtropical highland climate with 290 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 Johannesburg?
Green Onion can potentially be grown indoors in Johannesburg 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, Aug outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant green onion in Johannesburg?
Plant Green Onion in Johannesburg during April, May, June, July, August. These are the optimal months based on Johannesburg's USDA Zone 7 climate, 290 frost-free days, and temperature range of 4°C to 26°C.
Is green onion hard to grow in Johannesburg?
Green Onion is rated "easy" to grow in Johannesburg. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Green Onion in Johannesburg is Good.
What grows well with green onion in Johannesburg?
In Johannesburg, 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 Johannesburg's Zone 7 climate.
Does green onion need full sun in Johannesburg?
Green Onion requires full sun. In Johannesburg, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.