Zinnia · Benito Juarez, Mexico City, Mexico

When to plant zinnias in Benito Juarez

Main outdoor window

12-26 Jan

A climate estimate. Check your soil, forecast and cultivar.

Timed from last spring frost

9 February

In Benito Juarez, on your chosen risk.

First autumn frost

17 November

The far end of the outdoor season.

The average last frost. Half of all years are later than this.

Cautious Balanced Bold

This is a stretch here. The air-temperature model does not find the target soil warmth within the allowed planting period. This is not a measurement of your bed. Check soil temperature, the cultivar and local growing advice before choosing an outdoor date or a protected growing method.

Step by step in Benito Juarez

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.

Start indoors

12-26 Jan

Four weeks before your last frost, under cover or on a windowsill.

Sow in succession. A single sowing gives you a single glut. Sow a short row every 21 days through the window above and you get a steady supply instead.

Frost tolerance

Tender

Damaged below

0°C (32°F)

Days to flowering

60–80

Min soil temp

21°C (69.8°F)

Spacing

25 cm

Sowing depth

6 mm (0.2 in)

Sun

Full

Zinnias through the year

Against the frost risk in Benito Juarez

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Zinnias

Frost risk Start indoors Today

Open My Garden

Seasonal context

Rainfall and the growing season in Benito Juarez

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 Benito Juarez

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 zinnias, 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 zinnias for Benito Juarez

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 zinnias

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

Measure the soil at sowing depth. Aim for at least 21°C (69.8°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.
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.

Warmth, sun and a variety that fits the space

Dwarf and tall varieties serve different purposes. Pick a compact type for a patio pot, or a taller variety if you want stems for cutting.

Allow the spacing recommended for the variety. In humid conditions, choose a disease-resistant type where available and leave enough room to inspect and tend the plants.

Treat the local calendar as a seasonal starting point. The flowering result will also depend on light, water and the length of the warm season after planting.

Growing in a container

Compact zinnias suit sunny containers with drainage; choose the variety by its mature height rather than the size of the nursery plant.

Further reading: RHS zinnia growing guide . General crop guidance; local dates on this site are calculated separately. Source checked 18 September 2026 by Safe to Plant; this is not an expert review.

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

Why these dates

Dwarf and tall varieties serve different purposes. Pick a compact type for a patio pot, or a taller variety if you want stems for cutting.

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. Zinnias are timed from 4 weeks before that frost for an indoor start, with planting out 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Benito Juarez.

The median frost-free season here is 281 days, against 60 to 80 days to first flower for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.

See every crop timed for Benito Juarez →

Nearby

Zinnias in places close by

Mexico City 5 km Cuauhtémoc 5 km Coyoacán 6 km Miguel Hidalgo 6 km Iztacalco 6 km Magdalena Contreras 9 km

Also in Benito Juarez

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

Growing zinnias in Benito Juarez

Can I grow zinnias in Benito Juarez?

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.

Why is there no model planting window for zinnias in Benito Juarez?

The air-temperature model does not find the target soil warmth within the allowed planting period. This is not a measurement of your bed. Check soil temperature, the cultivar and local growing advice before choosing an outdoor date or a protected growing method.

How much frost will zinnias tolerate?