2026 Planting Guide
Fall cropWhen to Plant Onions in Vietnam
Complete guide to growing onions in Vietnam with optimal planting dates, recommended varieties, soil requirements, pest management, and harvest timing. Data sourced from national agricultural research organizations and FAO.
Monthly Planting Calendar
Visual overview of the onions growing season in Vietnam.
Quick Facts
Min. Soil Temp
15°C (59°F) minimum
Growing Period
75-100 days
From planting to harvest
Last Spring Frost
N/A
Tropical climate
First Fall Frost
N/A
No frost risk
Monthly Task Timeline
Month-by-month guide for managing onions in Vietnam.
January - March
HarvestCheck maturity indicators, schedule equipment, harvest at optimal moisture content.
April - September
Off-seasonCover crop planting, soil testing, equipment maintenance, and planning for next season.
October - December
PlantPrepare soil, apply starter fertilizer, and sow seeds at recommended depth and spacing.
Best Onions Varieties for Vietnam
These varieties have proven performance in Vietnam's climate and soil conditions. Always source certified seed from reputable dealers.
| # | Variety | Best For |
|---|---|---|
| 1 | Ninh Thuan Red | Vietnam climate |
| 2 | Vinh Chau shallot | Vietnam climate |
| 3 | Bac Ninh shallot | Vietnam climate |
| 4 | Hai Duong shallot | Vietnam climate |
Growing Tips for Vietnam
Region-specific advice from agricultural extension services and experienced Vietnam farmers.
Ninh Thuan province and Vinh Chau (Soc Trang) are primary onion/shallot zones
Shallots (hanh tim) are more common than bulb onions in Vietnamese cuisine
Dry season crop — plant October-December
Sandy coastal soils with good drainage are ideal
Thrips and purple blotch are main pest/disease concerns
Pest & Disease Watch
Monitor for these threats throughout the growing season. Integrated Pest Management (IPM) is recommended.
Thrips
Scout regularly and use integrated pest management
Onion maggot
Scout regularly and use integrated pest management
Purple blotch
Scout regularly and use integrated pest management
Downy mildew
Scout regularly and use integrated pest management
Stemphylium blight
Scout regularly and use integrated pest management
Companion Planting
These plants grow well alongside onions, improving pest control, pollination, and nutrient availability.
Frost Dates
No Frost Risk
Vietnam has a tropical or subtropical climate. Frost is generally not a concern, but altitude-dependent cold spells can occur in some areas.
Frequently Asked Questions
When is the best time to plant onions in Vietnam?
The optimal planting window for onions in Vietnam is October 1 to December 31. Soil temperature should reach at least 15°C (59°F) minimum before planting. The total growing period is 75-100 days.
What varieties of onions grow best in Vietnam?
The best varieties for Vietnam include Ninh Thuan Red, Vinh Chau shallot, Bac Ninh shallot, Hai Duong shallot. These varieties are adapted to local climate and soil conditions and have proven performance records.
When can I harvest onions in Vietnam?
The harvest window for onions in Vietnam is typically January 15 to March 31. The crop takes 75-100 days from planting to reach maturity.
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Data Sources
Data sourced from FAO and national agricultural extension services. Last updated: March 2026.
Planting dates are averages and may vary by county, elevation, and local microclimate. Always consult your local extension office for the most precise recommendations.