Growing Onion in Siem Reap
🇰🇭 Zone 13 Planting Guide · Tropical savanna climate
Quick Answer: Growing Onion in Siem Reap
Yes, you can grow Onion in Siem Reap, KH! Plant during Nov, Dec, Jan, Feb for best results. Siem Reap is in USDA Zone 13 with a Tropical savanna climate, offering 365 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
Siem Reap's climate requires careful timing. Summer highs (36°C) exceed Onion's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.
Siem Reap Climate Data
Onion Planting Calendar for Siem Reap
Green months show the best time to plant Onion in Siem Reap
Onion Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
90-120
From planting to first harvest
Difficulty
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.
Companion Plants for Onion
Find out which plants grow best alongside Onion — and which to keep apart
How to Grow Onion in Siem Reap
Siem Reap, KH is in USDA Hardiness Zone 13 with a Tropical savanna climate (Köppen Aw). With winter lows of 20°C and summer highs of 36°C, the growing season spans approximately 365 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 Siem Reap, the best months to plant Onion are November, December, January, February. 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.
Siem Reap receives 1380mm of annual rainfall, which provides good natural moisture for Onion. Supplement with additional watering during dry spells.
Other Plants That Grow in Siem Reap
More plants you can grow alongside Onion in Siem Reap
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Frequently Asked Questions
Can I grow onion in Siem Reap?
Yes! Onion can be successfully grown in Siem Reap, KH. Siem Reap is in USDA Hardiness Zone 13 with a Tropical savanna climate. The difficulty level for growing Onion here is rated "medium". The best months to plant are November, December, January, February.
When should I plant onion in Siem Reap?
In Siem Reap, the recommended planting months for Onion are November, December, January, February. Siem Reap has 365 frost-free days per year, with winter lows of 20°C and summer highs of 36°C. Onion is frost tolerant, giving you more flexibility with planting dates.
How long does onion take to grow in Siem Reap?
Onion typically takes 90-120 days from planting to harvest. In Siem Reap's Tropical savanna climate with 365 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 Siem Reap?
Onion can potentially be grown indoors in Siem Reap 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 Nov, Dec, Jan, Feb outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant onion in Siem Reap?
Plant Onion in Siem Reap during November, December, January, February. These are the optimal months based on Siem Reap's USDA Zone 13 climate, 365 frost-free days, and temperature range of 20°C to 36°C.
Is onion hard to grow in Siem Reap?
Onion is rated "medium" to grow in Siem Reap. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Onion in Siem Reap is Moderate.
What grows well with onion in Siem Reap?
In Siem Reap, 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 Siem Reap's Zone 13 climate.
Does onion need full sun in Siem Reap?
Onion requires full sun. In Siem Reap, provide at least 6 hours of direct sunlight daily. During peak summer heat, some afternoon shade can help prevent heat stress.