Choy sum · Aguascalientes, Aguascalientes, Mexico
When to plant choy sum in Aguascalientes
Main outdoor window
12-26 Feb
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
5 February
In Aguascalientes, 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 Aguascalientes
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.
Sow direct
12-26 Feb
One week after your last frost.
Harvest
1 Jun - 31 Oct
Choy sum through the year
Against the frost risk in Aguascalientes
Seasonal context
Rainfall and the growing season in Aguascalientes
July has the highest average precipitation (131 mm); April has the lowest (4 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 Aguascalientes
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 | 4.9°C (40.7°F)40.7°F (4.9°C) | 20.8°C (69.5°F)69.5°F (20.8°C) | 1.3 |
| February | 5.8°C (42.5°F)42.5°F (5.8°C) | 23.1°C (73.7°F)73.7°F (23.1°C) | 0.7 |
| March | 7.4°C (45.3°F)45.3°F (7.4°C) | 25.8°C (78.5°F)78.5°F (25.8°C) | 0.1 |
| April | 9.9°C (49.9°F)49.9°F (9.9°C) | 28.6°C (83.4°F)83.4°F (28.6°C) | 0.0 |
| May | 12.7°C (54.9°F)54.9°F (12.7°C) | 30.3°C (86.5°F)86.5°F (30.3°C) | 0.0 |
| June | 14.2°C (57.6°F)57.6°F (14.2°C) | 28.9°C (84.1°F)84.1°F (28.9°C) | 0.0 |
| July | 13.2°C (55.8°F)55.8°F (13.2°C) | 27.1°C (80.8°F)80.8°F (27.1°C) | 0.0 |
| August | 13°C (55.4°F)55.4°F (13°C) | 27.2°C (81°F)81°F (27.2°C) | 0.0 |
| September | 12.7°C (54.8°F)54.8°F (12.7°C) | 26.2°C (79.2°F)79.2°F (26.2°C) | 0.0 |
| October | 10.5°C (50.9°F)50.9°F (10.5°C) | 25.4°C (77.7°F)77.7°F (25.4°C) | 0.0 |
| November | 7.6°C (45.7°F)45.7°F (7.6°C) | 23.3°C (73.9°F)73.9°F (23.3°C) | 0.5 |
| December | 5.7°C (42.3°F)42.3°F (5.7°C) | 21.1°C (70°F)70°F (21.1°C) | 1.0 |
For choy sum, 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 choy sum for Aguascalientes
- July is the wettest month in the rainfall grid, averaging about 131 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 choy sum
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 10°C (50°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.
- Use the maturity range on your seed packet when choosing a variety. Cold, short days and transplant stress can make harvest later than the calendar estimate.
Grow choy sum for tender stems and small flower buds
Use a suitable seasonal variety in fertile, drained soil with steady moisture. Small repeated sowings make it easier to use the crop during its preferred tender stage than one large sowing that flowers all at once.
Cut tender stems with young leaves and developing buds before the stalks become coarse. Check the cultivar's expected regrowth rather than promising repeated harvests from every planting. Record the stage that cooks best in your kitchen.
What to record this season
How long did the tender flowering-shoot stage last before stems became fibrous? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: How to Grow Choy Sum / Yu Choy - The Woks of Life . 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.
The Woks of Life describes choy sum cultivation with grower input from Choy Division in New York. The growing-season observations are regional, not a worldwide sowing calendar.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Use a suitable seasonal variety in fertile, drained soil with steady moisture. Small repeated sowings make it easier to use the crop during its preferred tender stage than one large sowing that flowers all at once.
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. Choy sum are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Aguascalientes.
The median frost-free season here is 296 days, against 40 to 55 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Nearby
Choy sum in places close by
Also in Aguascalientes
Other vegetables to time
Growing choy sum in Aguascalientes
Can I grow choy sum in Aguascalientes?
The calendar estimates a planting window, not a guarantee of success. July is the wettest month in the rainfall grid, averaging about 131 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 choy sum in Aguascalientes?
Aim for 12-26 Feb in an average year. If you would rather not gamble on the weather, wait until 11-25 Mar - by then frost has finished in nine years out of ten.
When might choy sum be ready to harvest in Aguascalientes?
The estimated period is 1 Jun - 31 Oct, based on 40 to 55 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 choy sum 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.