Zinnia · Dhaka, Dhaka Division, Bangladesh
When to plant zinnias in Dhaka
Main outdoor window
1 Feb - 18 Mar
A climate estimate. Check your soil, forecast and cultivar.
Timed from temperature
February to November
No frost on record in Dhaka, so the months this crop fits in our temperature model set the timing. This does not confirm local suitability.
First flowers
2-22 Apr
If you plant at the start of the window.
Temperature-based estimate. Dhaka has no dependable frost season.
These dates do not account for rain, humidity or waterlogging. Check the local growing season,
especially in monsoon climates, before treating this window as a planting recommendation.
Rainfall check: the wettest month is July (about 437 mm), and the driest is
January (about 9 mm).
Compare all months and check the limitations before choosing the season.
Step by step in Dhaka
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
1 Feb - 18 Mar
The opening weeks of the stretch when the average temperature suits this crop, which here runs from February to November. There is no frost to work around, so heat is what sets the timing.
In flower
2-22 Apr
Zinnias through the year
Against the monthly temperature record in Dhaka
Seasonal context
Rainfall and the growing season in Dhaka
July has the highest average precipitation (437 mm); January has the lowest (9 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.
Frost-free does not mean every month is suitable. In tropical and monsoon climates, rainfall, heat, drainage and the cultivar can set the practical growing season. Match the temperature window to these conditions and check advice from a local grower before buying planting material.
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 Dhaka
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 | 12°C (53.6°F)53.6°F (12°C) | 24.8°C (76.7°F)76.7°F (24.8°C) | 0.0 |
| February | 15.4°C (59.7°F)59.7°F (15.4°C) | 29°C (84.2°F)84.2°F (29°C) | 0.0 |
| March | 20.3°C (68.6°F)68.6°F (20.3°C) | 34°C (93.2°F)93.2°F (34°C) | 0.0 |
| April | 24.4°C (75.8°F)75.8°F (24.4°C) | 36°C (96.7°F)96.7°F (36°C) | 0.0 |
| May | 26°C (78.7°F)78.7°F (26°C) | 34.1°C (93.3°F)93.3°F (34.1°C) | 0.0 |
| June | 26.6°C (79.8°F)79.8°F (26.6°C) | 31.7°C (89°F)89°F (31.7°C) | 0.0 |
| July | 26.4°C (79.5°F)79.5°F (26.4°C) | 31.1°C (88°F)88°F (31.1°C) | 0.0 |
| August | 26.1°C (79°F)79°F (26.1°C) | 30.9°C (87.6°F)87.6°F (30.9°C) | 0.0 |
| September | 25.6°C (78.1°F)78.1°F (25.6°C) | 30.5°C (87°F)87°F (30.5°C) | 0.0 |
| October | 23.3°C (73.9°F)73.9°F (23.3°C) | 29.9°C (85.9°F)85.9°F (29.9°C) | 0.0 |
| November | 18.2°C (64.8°F)64.8°F (18.2°C) | 27.8°C (82°F)82°F (27.8°C) | 0.0 |
| December | 13.9°C (56.9°F)56.9°F (13.9°C) | 25°C (77°F)77°F (25°C) | 0.0 |
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 Dhaka
- July is the wettest month in the rainfall grid, averaging about 437 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.
- In a frost-free climate, check seasonal rainfall, humidity and heat before planting. A month with suitable average temperatures can still be too wet, dry or hot for this crop.
- 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
Frost-relative timing needs a dependable seasonal frost date. Dhaka has no such date in this record, so this page compares monthly temperatures with the crop's model range instead. Local wet and dry seasons, day length and cultivar requirements still need a separate check.
The model uses a growing-temperature band for zinnias between 21°C (69.8°F)69.8°F (21°C) and 32°C (89.6°F)89.6°F (32°C) — and in Dhaka that is February to November, 10 months of the year, taken from this location's own monthly averages. The planting window begins near the start of this period. The catalog estimate is 60 to 80 days from planting to flowering under suitable conditions.
Also in Dhaka
Other flowers to time
Growing zinnias in Dhaka
Can I grow zinnias in Dhaka?
The calendar estimates a planting window, not a guarantee of success. July is the wettest month in the rainfall grid, averaging about 437 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 zinnias in Dhaka?
The temperature-based window is 1 Feb - 18 Mar. Dhaka has no dependable frost season: February to November have monthly averages inside the model range for zinnias. Check seasonal rainfall, heat and cultivar requirements before planting.
When might zinnias flower in Dhaka?
The estimated period is 2-22 Apr, 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 zinnias 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.