Hellebore · Azcapotzalco, Mexico City, Mexico
When to plant hellebores in Azcapotzalco
Main outdoor window
17 Nov - 26 Jan
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
9 February
In Azcapotzalco, on your chosen risk.
First flowers
1 Jan - 31 Mar
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 Azcapotzalco
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
17 Nov - 26 Jan
Any time the plant is dormant and the ground is neither frozen nor waterlogged: after leaf fall in autumn, or at the end of winter before growth restarts.
In flower
1 Jan - 31 Mar
Hellebores through the year
Against the frost risk in Azcapotzalco
Seasonal context
Rainfall and the growing season in Azcapotzalco
July has the highest average precipitation (156 mm); December has the lowest (6 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 Azcapotzalco
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°C (39.3°F)39.3°F (4°C) | 19.3°C (66.7°F)66.7°F (19.3°C) | 1.3 |
| February | 5°C (41°F)41°F (5°C) | 21.7°C (71°F)71°F (21.7°C) | 0.7 |
| March | 6.5°C (43.6°F)43.6°F (6.5°C) | 24°C (75.2°F)75.2°F (24°C) | 0.2 |
| April | 8.6°C (47.4°F)47.4°F (8.6°C) | 25.9°C (78.6°F)78.6°F (25.9°C) | 0.0 |
| May | 10.1°C (50.2°F)50.2°F (10.1°C) | 26°C (78.8°F)78.8°F (26°C) | 0.0 |
| June | 10.5°C (51°F)51°F (10.5°C) | 23.5°C (74.4°F)74.4°F (23.5°C) | 0.0 |
| July | 10°C (50.1°F)50.1°F (10°C) | 21.5°C (70.8°F)70.8°F (21.5°C) | 0.0 |
| August | 10°C (49.9°F)49.9°F (10°C) | 21.1°C (70.1°F)70.1°F (21.1°C) | 0.0 |
| September | 9.7°C (49.4°F)49.4°F (9.7°C) | 20.3°C (68.5°F)68.5°F (20.3°C) | 0.0 |
| October | 7.8°C (46.1°F)46.1°F (7.8°C) | 20°C (68°F)68°F (20°C) | 0.3 |
| November | 5.9°C (42.6°F)42.6°F (5.9°C) | 19.6°C (67.3°F)67.3°F (19.6°C) | 0.8 |
| December | 4.6°C (40.4°F)40.4°F (4.6°C) | 19.2°C (66.6°F)66.6°F (19.2°C) | 0.8 |
For hellebores, 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 hellebores for Azcapotzalco
- July is the wettest month in the rainfall grid, averaging about 156 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 hellebores
Use the calendar to plan ahead, then check the conditions in your own garden.
- Frost tolerance does not make saturated or frozen soil suitable for planting. Wait until the bed can be worked without smearing or compacting it.
- Check mature size, drainage and cultivar suitability before choosing a permanent position. A suitable planting window does not guarantee long-term survival or fruiting.
Choose hellebore flowers and protect the crown from soggy soil
Use suitable partial shade and fertile, well-drained soil with moisture available. Avoid a persistently soggy crown and harsh exposure that damages leaves. Leave room for a mature clump rather than filling every gap around a small new plant.
Remove damaged or diseased leaves carefully without cutting emerging flower stems. Manage unwanted seedlings and use gloves if sap irritates the skin. Hellebores are poisonous if eaten, so keep them separate from kitchen greens.
What to record this season
Did the clump retain healthy leaves and produce the flower form you intended? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: NC State Extension: Helleborus x hybridus . 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 reference describes plant identity and cultivation. Its regional calendar months and hardiness observations do not validate the calculated dates for another location.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Use suitable partial shade and fertile, well-drained soil with moisture available. Avoid a persistently soggy crown and harsh exposure that damages leaves. Leave room for a mature clump rather than filling every gap around a small new plant.
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.
Hellebores are planted once and then left in place, so there is no sowing offset to resolve. What matters in Azcapotzalco is the shape of the year: this crop is dormant through the winter and is planted while it sleeps, any time between leaf fall in autumn and the restart of growth in spring, so long as the ground is neither frozen nor waterlogged. That is why the window below spans the cold months rather than sitting in the middle of the growing season.
Azcapotzalco sits in zone 9b, which is above the catalog range. Confirm the exact cultivar locally; a zone number alone cannot measure summer heat or winter chill. 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 2, under suitable conditions. This is not a prediction for this location; cultivar, winter conditions and care determine whether it flowers reliably.
Nearby
Hellebores in places close by
Also in Azcapotzalco
Other flowers to time
Growing hellebores in Azcapotzalco
Can I grow hellebores in Azcapotzalco?
The calendar estimates a planting window, not a guarantee of success. July is the wettest month in the rainfall grid, averaging about 156 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 hellebores in Azcapotzalco?
Aim for 17 Nov - 26 Jan in an average year. If you would rather not gamble on the weather, wait until 25 Oct - 20 Feb - by then frost has finished in nine years out of ten.
When might hellebores flower in Azcapotzalco?
The estimated period is 1 Jan - 31 Mar, based on 150 to 190 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 hellebores 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.