Vietnamese coriander · Linqiong, Sichuan, China
When to plant vietnamese coriander in Linqiong
Main outdoor window
7-28 Apr
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
12 February
In Linqiong, on your chosen risk.
Ready to pick
1 Jun - 31 Oct
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Linqiong
Download these planting dates (.ics)
Import into Apple Calendar, Google Calendar or Outlook. Dates use the selected risk level and are planning estimates, not frost alerts.
Each window is a planning range. Check the forecast, soil and cultivar before planting; a later date is not automatically safer in hot or wet conditions.
Plant out
7-28 Apr
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 26 Feb. Measure your soil before planting.
Harvest
1 Jun - 31 Oct
Vietnamese coriander through the year
Against the frost risk in Linqiong
Seasonal context
Rainfall and the growing season in Linqiong
August has the highest average precipitation (274 mm); January has the lowest (12 mm). Compare this pattern with the planting windows and your water supply.
During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.
Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.
Monthly growing conditions in Linqiong
Compare the planting window with the local temperature pattern. These are historical monthly averages, not this year's forecast or measured soil temperatures. Average frost days do not tell you whether a particular night will freeze.
| Month | Average low | Average high | Frost days |
|---|---|---|---|
| January | 0.7°C (33.2°F)33.2°F (0.7°C) | 10.1°C (50.2°F)50.2°F (10.1°C) | 12.6 |
| February | 3°C (37.4°F)37.4°F (3°C) | 13.3°C (55.9°F)55.9°F (13.3°C) | 4.5 |
| March | 7.8°C (46.1°F)46.1°F (7.8°C) | 18.9°C (66°F)66°F (18.9°C) | 0.3 |
| April | 13°C (55.3°F)55.3°F (13°C) | 24.3°C (75.7°F)75.7°F (24.3°C) | 0.0 |
| May | 17.1°C (62.7°F)62.7°F (17.1°C) | 27.9°C (82.3°F)82.3°F (27.9°C) | 0.0 |
| June | 20.4°C (68.8°F)68.8°F (20.4°C) | 30.5°C (86.8°F)86.8°F (30.5°C) | 0.0 |
| July | 22.7°C (72.9°F)72.9°F (22.7°C) | 30.7°C (87.2°F)87.2°F (30.7°C) | 0.0 |
| August | 22.2°C (71.9°F)71.9°F (22.2°C) | 29.5°C (85°F)85°F (29.5°C) | 0.0 |
| September | 18.5°C (65.3°F)65.3°F (18.5°C) | 26°C (78.7°F)78.7°F (26°C) | 0.0 |
| October | 13.5°C (56.2°F)56.2°F (13.5°C) | 21.1°C (69.9°F)69.9°F (21.1°C) | 0.0 |
| November | 7.8°C (46.1°F)46.1°F (7.8°C) | 16.3°C (61.3°F)61.3°F (16.3°C) | 0.3 |
| December | 2.1°C (35.8°F)35.8°F (2.1°C) | 11.1°C (51.9°F)51.9°F (11.1°C) | 6.4 |
For vietnamese coriander, also check drainage, sunlight and cultivar requirements. See the rainfall context above; humidity, irrigation and local pest pressure are not calculated.
Local growing check
Before choosing vietnamese coriander for Linqiong
- August is the wettest month in the rainfall grid, averaging about 274 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
The temperature and rainfall tables on this page show the underlying climate estimates. How these suitability checks work · Record what happens in your garden.
Before you plant vietnamese coriander
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 18°C (64.4°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Check the local overnight forecast before planting out. Delay planting or keep protection ready if frost is forecast, even after the historical last-frost date.
- Harden off plants raised indoors: gradually expose them to outdoor light, wind and temperature before their final move into the bed.
- Check mature size, drainage and cultivar suitability before choosing a permanent position. A suitable planting window does not guarantee long-term survival or fruiting.
Keep rau ram moist and distinguish it from seed coriander
Choose a warm, moist position, with partial shade useful where strong sun dries the leaves and pot quickly. Unlike woody Mediterranean herbs, it is poorly suited to being allowed to dry hard between waterings.
Healthy stem cuttings are a practical way to establish replacements. Pick young shoots once plants are growing well and provide winter shelter where temperatures become unsuitable. Indoor overwintering needs both light and moisture; a dry heated room can be difficult even when frost is excluded.
What to record this season
Could the root zone stay moist without the plant losing vigour indoors or outdoors? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: Plants For A Future: Persicaria odorata . General crop guidance; local dates on this site are calculated separately. Source checked 19 September 2026 by Safe to Plant; this is not an expert review.
Plants For A Future compiles botanical and cultivation references. This is general species guidance, not a local field trial or evidence that every cultivar will crop in your climate.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Choose a warm, moist position, with partial shade useful where strong sun dries the leaves and pot quickly. Unlike woody Mediterranean herbs, it is poorly suited to being allowed to dry hard between waterings.
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.
This calendar uses frost-relative offsets as a starting point. Vietnamese coriander are timed with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Linqiong.
The calendar also applies a soil-warming estimate derived from historical air temperatures. Where that estimate is later than the frost-based date, it delays the window. Soil in your own garden can warm earlier or later; a thermometer at sowing depth is a better final check. Cold, wet conditions can slow germination and increase decay risk.
Linqiong sits in zone 9b, which is colder than the catalog range. Check a locally proven cultivar and a realistic protection plan before planting. The calculated dates do not confirm that this crop is suitable here. Check cultivar requirements and local growing experience before planting.
The general establishment guide is around year 1, under suitable conditions. This is not a prediction for this location; cultivar, winter conditions and care determine whether it crops reliably.
Growing vietnamese coriander in Linqiong
Can I grow vietnamese coriander in Linqiong?
The calendar estimates a planting window, not a guarantee of success. August is the wettest month in the rainfall grid, averaging about 274 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
When should I plant vietnamese coriander in Linqiong?
Aim for 7-28 Apr in an average year. If you would rather not gamble on the weather, wait until 6-27 Apr - by then frost has finished in nine years out of ten.
Can I plant vietnamese coriander earlier in Linqiong?
The historical frost estimate is 26 Feb. For Vietnamese coriander, an air-temperature model estimates soil warmth of about 18°C (64.4°F) around 7 Apr. This is not a soil measurement or a forecast. Check your bed at sowing depth; cold, wet conditions can slow growth and increase decay risk.
When might vietnamese coriander be ready to harvest in Linqiong?
The estimated period is 1 Jun - 31 Oct, based on 60 to 80 days from the modeled planting date. Cultivar, planting material and growing conditions can change this interval; check the plant as well as the calendar.
How much frost will vietnamese coriander tolerate?
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.