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🥬 Vegetable medium

Growing Onion in Beirut

🇱🇧 Zone 9 Planting Guide · Hot-summer Mediterranean climate

USDA Zone 9 355 frost-free days 90-120 days to harvest

Quick Answer: Growing Onion in Beirut

Yes, you can grow Onion in Beirut, LB! Plant during Oct, Nov for best results. Beirut is in USDA Zone 9 with a Hot-summer Mediterranean climate, offering 355 frost-free days per year. The difficulty level is medium, and Onion takes 90-120 days to harvest. Onion needs full sun and regular watering.

Climate Match Analysis

Good Match Beirut + Onion

Beirut's temperatures (10°C to 30°C) are within the tolerable range for Onion (-2°C to 30°C), though not always in the optimal zone (12°C to 24°C). Plant during recommended months for best results.

Onion tolerates -2°C to 30°C
Optimal: 12°C - 24°C
Beirut range 10°C to 30°C

Beirut Climate Data

USDA Zone
9
Frost-Free
355days
Winter Low
10°C
Summer High
30°C
Rainfall
825mm/yr
Climate
Csa
Hot-summer Mediterranean

Onion Planting Calendar for Beirut

Green months show the best time to plant Onion in Beirut

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Plant Onion Not recommended

Onion Growing Requirements

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Sunlight

Full Sun

6+ hours direct sunlight

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Water

Regular

Consistent moisture, 1-2 inches/week

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Days to Harvest

90-120

From planting to first harvest

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Difficulty

medium

Some experience helpful

💡 Growing Tips for Onion

Day length triggers bulbing -- choose variety appropriate for your latitude. Can be planted 2-3 weeks before the last expected frost in your area, giving it a head start on the growing season. 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: Onion is frost tolerant — you can plant earlier in spring.

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Companion Plants for Onion

Find out which plants grow best alongside Onion — and which to keep apart

How to Grow Onion in Beirut

Beirut, LB is in USDA Hardiness Zone 9 with a Hot-summer Mediterranean climate (Köppen Csa). With winter lows of 10°C and summer highs of 30°C, the growing season spans approximately 355 frost-free days. Onion grows well with some gardening knowledge in this climate.

Onion thrives in temperatures between 12°C and 24°C, requiring full sun and regular watering. In Beirut, the best months to plant Onion are October, November. Since Onion can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 90-120 days after planting.

With 825mm of annual rainfall, Beirut provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.

Other Plants That Grow in Beirut

More plants you can grow alongside Onion in Beirut

Keep Exploring

Frequently Asked Questions

Can I grow onion in Beirut?

Yes! Onion can be successfully grown in Beirut, LB. Beirut is in USDA Hardiness Zone 9 with a Hot-summer Mediterranean climate. The difficulty level for growing Onion here is rated "medium". The best months to plant are October, November.

When should I plant onion in Beirut?

In Beirut, the recommended planting months for Onion are October, November. Beirut has 355 frost-free days per year, with winter lows of 10°C and summer highs of 30°C. Onion is frost tolerant, giving you more flexibility with planting dates.

How long does onion take to grow in Beirut?

Onion typically takes 90-120 days from planting to harvest. In Beirut's Hot-summer Mediterranean climate with 355 frost-free days, you have plenty of time to grow Onion to maturity. Day length triggers bulbing -- choose variety appropriate for your latitude. Can be planted 2-3 weeks before the last expected frost in your area, giving it a head start on the growing season. 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 onion indoors in Beirut?

Onion can potentially be grown indoors in Beirut 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 Oct, Nov outdoor planting window. Use containers with good drainage and regular watering.

What month do I plant onion in Beirut?

Plant Onion in Beirut during October, November. These are the optimal months based on Beirut's USDA Zone 9 climate, 355 frost-free days, and temperature range of 10°C to 30°C.

Is onion hard to grow in Beirut?

Onion is rated "medium" to grow in Beirut. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Onion in Beirut is Good.

What grows well with onion in Beirut?

In Beirut, you can grow many companion plants alongside 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 Beirut's Zone 9 climate.

Does onion need full sun in Beirut?

Onion requires full sun. In Beirut, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.

Last updated: March 2026 · Climate data from NOAA, FAO, USDA

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