When to Plant Tuberous begonias in Mexico City, Mexico

Step by step in Mexico City

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 the tubers

25 Feb - 25 Mar

Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 23 Feb. Measure your soil before planting. This crop is never fully dormant, so it cannot be planted bare-root in winter.

In flower

1 Jun - 31 Oct

Frost tolerance

Tender

Damaged below

0°C (32°F)

Hardy to

Zone 9a–11a

Min soil temp

15°C (59°F)

Spacing

25 cm

Sowing depth

20 mm (0.8 in)

Sun

Partial

Tuberous begonias through the year

Against the frost risk in Mexico City

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Tuberous begonias

Frost risk Plant Harvest Today

Seasonal context

Rainfall and the growing season in Mexico City

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.

Jan 9 mm

Feb 12 mm

Mar 15 mm

Apr 21 mm

May 55 mm

Jun 133 mm

Jul 156 mm

Aug 153 mm

Sep 150 mm

Oct 65 mm

Nov 20 mm

Dec 6 mm

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 Mexico City

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.

NASA POWER climate averages, 1995–2024
Month	Average low	Average high	Frost days
January	4°C (39.3°F)	19.3°C (66.7°F)	1.3
February	5°C (41°F)	21.7°C (71°F)	0.7
March	6.5°C (43.6°F)	24°C (75.2°F)	0.2
April	8.6°C (47.4°F)	25.9°C (78.6°F)	0.0
May	10.1°C (50.2°F)	26°C (78.8°F)	0.0
June	10.5°C (51°F)	23.5°C (74.4°F)	0.0
July	10°C (50.1°F)	21.5°C (70.8°F)	0.0
August	10°C (49.9°F)	21.1°C (70.1°F)	0.0
September	9.7°C (49.4°F)	20.3°C (68.5°F)	0.0
October	7.8°C (46.1°F)	20°C (68°F)	0.3
November	5.9°C (42.6°F)	19.6°C (67.3°F)	0.8
December	4.6°C (40.4°F)	19.2°C (66.6°F)	0.8

For tuberous begonias, 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 tuberous begonias for Mexico City

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 tuberous begonias

Use the calendar to plan ahead, then check the conditions in your own garden.

Measure the soil at sowing depth. Aim for at least 15°C (59°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.
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 upright or trailing begonias and plan the dormant season

Provide bright filtered light or suitable partial shade, protection from strong wind and moist but drained growing medium. Keep air moving between plants and avoid both severe drying and a permanently wet tuber.

Remove spent flowers and damaged leaves. When foliage yellows into dormancy, reduce watering and use appropriate frost-free storage for sound tubers where required. Do not keep an inactive tuber wet simply because the summer plant needed frequent watering.

What to record this season

Did the selected habit suit the container, and did the tuber store without rot? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.

Further reading: Begonia – Tuberous Types (Hybrid Tuberous Begonia, Tuberous Begonia) | North Carolina Extension Gardener Plant Toolbox . 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. This reference covers the broader plant group; confirm the named form and its specific requirements with the supplier.

How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy

Why these dates

Provide bright filtered light or suitable partial shade, protection from strong wind and moist but drained growing medium. Keep air moving between plants and avoid both severe drying and a permanently wet tuber.

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.

Tuberous begonias are planted once and then left in place, so there is no sowing offset to resolve. Nor is there a dormant season to plant into: this crop keeps its leaves and keeps growing through the winter, which is exactly why cold damages it. The window on this page therefore waits until the last frost in Mexico City has passed and the soil has begun to warm, giving the roots the longest possible run before the cold returns.

Mexico City is zone 9b, within the crop's general range. This is an initial cold-hardiness check; cultivar, exposure, drainage and unusual winters can still change the outcome.

See every crop timed for Mexico City →

Nearby

Tuberous begonias in places close by

Cuauhtémoc 3 km Benito Juarez 5 km Iztacalco 5 km Gustavo Adolfo Madero 7 km Miguel Hidalgo 8 km Azcapotzalco 9 km

Also in Mexico City

Other flowers to time

Tulips very hardy Daffodils very hardy Dahlias tender Sunflowers tender Crocuses very hardy Peonies very hardy Calendulas hardy Hyacinths very hardy Sweet peas hardy Pansies very hardy Snowdrops very hardy Zinnias tender

Growing tuberous begonias in Mexico City

Can I grow tuberous begonias in Mexico City?

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 tuberous begonias in Mexico City?

Aim for 25 Feb - 25 Mar in an average year. If you would rather not gamble on the weather, wait until 20 Mar - 17 Apr - by then frost has finished in nine years out of ten.

Can I plant tuberous begonias earlier in Mexico City?

The historical frost estimate is 23 Feb. For Tuberous begonias, an air-temperature model estimates soil warmth of about 15°C (59°F) around 25 Feb. 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 tuberous begonias flower in Mexico City?

The estimated period is 1 Jun - 31 Oct, based on 90 to 120 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 tuberous begonias tolerate?