Planning polyhouse farming in Coimbatore? Coimbatore is a city of about 21.4 lakh people (GeoNames) in Coimbatore district, Tamil Nadu[1][2], about 230 km from Bengaluru. This guide works from Coimbatore's own monthly climate to suggest the protected structure, the crops to start with, and the months each crop is likely to do well.
Climate for polyhouse farming in Coimbatore
March is the hottest month in Coimbatore, with average daily highs of about 35°C. January has the coolest nights, averaging 16°C.[3] The area gets about 1,142 mm of rain a year, most of it in May to November, peaking in October at about 192 mm. Average humidity stays at 75% or more in May to December, which raises the risk of leaf disease and slows evaporative cooling. Coimbatore sits about 432 m above sea level.[2] On the Köppen–Geiger climate map, Coimbatore falls in the tropical savanna (dry winter) zone (Aw).[4]
Coimbatore climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
29.5
16.0
67
6
Feb
32.7
17.5
56
9
Mar
35.0
20.3
53
30
Apr
34.5
22.2
63
60
May
31.1
22.0
76
118
Jun
28.0
21.0
83
162
Jul
27.1
20.5
85
157
Aug
27.2
20.2
85
136
Sep
27.8
20.1
85
126
Oct
27.7
20.0
85
192
Nov
26.9
18.7
84
118
Dec
27.3
16.7
79
28
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Coimbatore. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Coimbatore
1
Year-round crops
Under cover, cucumber can be grown for 10 months a year in Coimbatore, so you can supply buyers every week instead of one open-field season.
2
Better yield and price
Plants grow without rain, hail and wind damage, so yields are higher and more even, and clean, graded produce sells at a better price, especially off-season.
3
Less water
Drip irrigation under cover uses less water than flood irrigation, and the roof keeps October's 192 mm of rain off the crop and the soil.
4
Less pesticides
Insect net on vents and doors keeps out most pests, and controlled ventilation helps with leaf disease in the humid months (May to December), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Tamil Nadu can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Coimbatore?
For polyhouse farming in Coimbatore, the structure decides which months you can crop and what it costs to run. With average highs between 27°C and 35°C through the year, Coimbatore suits a naturally ventilated polyhouse for most crops. Fan & Pad cooling is rarely needed; spend the budget on good ventilation, insect net and a shade screen. Sunlight peaks in March at about 6.4 kWh per m² a day, so add a shade screen for leafy greens in the brightest months.
A nethouse, the lowest-cost option, can grow hardy crops in December to February, when it is mild and fairly dry.
Crops for Coimbatore
Based on Coimbatore's climate, the crops with the longest growing windows are cucumber (10 months), chilli pepper (10 months) and brinjal (10 months). Cucumber fits May to February in a naturally ventilated polyhouse. Lilium and carnation are hard to time here, so we would leave them out of the first season. These are the crops we would plan first for polyhouse farming in Coimbatore.
Months each crop suits in Coimbatore
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Jun–Jan
All year
Tomato
Jun–Jan
All year
Cucumber
May–Feb
All year
Chilli pepper
May–Feb
All year
Brinjal
May–Feb
All year
Lettuce
Jun–Dec
May–Mar
Broccoli
Difficult
Dec
Strawberry
Difficult
Difficult
Rose
Jun–Dec
Jun–Mar
Gerbera
Jun–Dec
May–Mar
Carnation
Difficult
Dec–Jan
Chrysanthemum
Jun–Dec
Jun–Mar
Anthurium
Jun–Jan
All year
Orchids
Jun–Jan
All year
Lilium
Difficult
Dec
Kryzen planning estimate from the monthly averages above and each crop's usual day and night temperature range. Variety, soil or substrate temperature and shading change the result, so confirm with a trial.
₹8,325Spending per person per month, urban Tamil Nadu, 2023–24[6]
230 kmto Bengaluru, the nearest metro (straight line)
Urban households in Tamil Nadu spent an average of ₹8,325 per person per month in 2023–24, above the all-India urban average of ₹7,078.[6] A city of this size has hotels, restaurants, modern retail and quick-commerce stores within its own limits, so most harvests can be sold locally. Line up two or three buyers before planting and agree on grade and delivery days.
Polyhouse farming in Coimbatore with Kryzen
We have built 9 projects in Tamil Nadu so far (see our project map (opens in a new tab)). Coimbatore is about 840 km in a straight line from our factory and master warehouse at Degaon, Wai (Satara), our nearest site.
Towns near Coimbatore
We also plan and build farms in these towns near Coimbatore:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Coimbatore: FAQs
Can a polyhouse farm run all year in Coimbatore?
Yes, with the right structure. For Coimbatore we would plan a naturally ventilated polyhouse. Even then, lettuce is hard to grow in April, so plan another crop for those months.
Which polyhouse is best for Coimbatore?
With March highs of about 35°C and 53% average humidity in that month, we would start with a naturally ventilated polyhouse.
Which crops should I grow in a polyhouse in Coimbatore?
Going by the monthly climate, capsicum, tomato and cucumber have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Coimbatore?
It can be, if the crop, the structure and the buyers match. In Coimbatore, cucumber and chilli pepper have the longest seasons under cover. Confirm prices and volumes with buyers first; our Detailed Project Report works out the cost, yield and returns for your plot.
Does Kryzen build polyhouses in Coimbatore?
Yes. Our nearest site is our factory and master warehouse at Degaon, Wai (Satara), about 840 km away, and we have built 9 projects in Tamil Nadu.
Is there a subsidy for polyhouse or hydroponic farms in Tamil Nadu?
Yes. Protected cultivation projects in Tamil Nadu can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department. Check the current rate and area limit when you apply.
Discuss your Coimbatore farm project
Share your plot location, water test and crop targets. We will suggest the right structure and growing system, and send an itemised quotation.
A computer engineer turned hydroponic farmer from a multigenerational farming family in Satara. Sudhir founded Kryzen in 2019, and the team has since built 350+ protected and hydroponic farms across India.
