Planning polyhouse farming in Karur? Karur is a mid-sized city in Karur district, Tamil Nadu, home to about 2.3 lakh people (GeoNames)[1][2], about 230 km from Bengaluru. This guide works from Karur'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 Karur
April is the hottest month in Karur, with average daily highs of about 38°C. January has the coolest nights, averaging 17°C.[3] The area gets about 765 mm of rain a year. The wettest months are September to November, peaking in October at about 154 mm. Average humidity stays at 75% or more in October to December, which raises the risk of leaf disease and slows evaporative cooling. Karur sits about 122 m above sea level.[2] On the Köppen–Geiger climate map, Karur falls in the hot semi-arid zone (BSh).[4]
Karur climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
31.0
17.3
70
7
Feb
34.1
18.7
60
9
Mar
37.3
22.1
52
18
Apr
38.0
25.0
53
36
May
35.7
24.9
62
78
Jun
34.0
23.5
65
39
Jul
33.5
23.1
65
55
Aug
33.4
22.7
67
77
Sep
32.8
22.5
70
101
Oct
31.2
22.1
77
154
Nov
29.1
20.3
82
142
Dec
29.1
18.1
79
49
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Karur. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Karur
1
Year-round crops
Under cover, capsicum can be grown for the whole year in Karur, 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 154 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 (October 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 Karur?
For polyhouse farming in Karur, the structure decides which months you can crop and what it costs to run. Average highs stay at 33°C or more in February to August, with moderate humidity of about 61%. In that dry air, wet pads can bring a 38°C April afternoon down to roughly 32°C inside a Fan & Pad polyhouse, which keeps herbs and vine crops going; lettuce will still struggle in the hottest weeks. Capsicum, cucumber and tomato do well in a naturally ventilated polyhouse with a shade screen. If you want one structure, decide by crop: greens all year point to Fan & Pad; vine crops point to a naturally ventilated house.
Sunlight peaks in April at about 6.5 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 January and June to August, when it is mild and fairly dry.
Crops for Karur
Based on Karur's climate, the crops with the longest growing windows are capsicum (all year), tomato (all year) and cucumber (all year). Capsicum fits all year with Fan & Pad cooling. 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 Karur.
Months each crop suits in Karur
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Nov–Jan
All year
Tomato
Nov–Jan
All year
Cucumber
Jun–Jan
All year
Chilli pepper
Sep–Jan
All year
Brinjal
Sep–Jan
All year
Lettuce
Difficult
Jul–Feb
Broccoli
Difficult
Difficult
Strawberry
Difficult
Difficult
Rose
Difficult
Nov–Feb
Gerbera
Difficult
Jul–Feb
Carnation
Difficult
Difficult
Chrysanthemum
Difficult
Nov–Feb
Anthurium
Nov–Dec
All year
Orchids
Nov–Dec
All year
Lilium
Difficult
Difficult
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] Karur is large enough for steady local sales to restaurants, hotels and fruit-and-vegetable retailers. Start with a farm size that matches the orders you can confirm. For premium vegetable and flower buyers, Bengaluru is within a day's delivery, about 230 km away.
Polyhouse farming in Karur with Kryzen
We have built 9 projects in Tamil Nadu so far (see our project map (opens in a new tab)). Karur is about 900 km in a straight line from our factory and master warehouse at Degaon, Wai (Satara), our nearest site.
Towns near Karur
We also plan and build farms in these towns near Karur:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Karur: FAQs
Can a polyhouse farm run all year in Karur?
Yes, with the right structure. For Karur we would plan Fan & Pad cooling for leafy greens and a naturally ventilated polyhouse for vine crops. Even then, lettuce is hard to grow in March to June, so plan another crop for those months.
Which polyhouse is best for Karur?
With April highs of about 38°C and 53% average humidity in that month, we would start with Fan & Pad cooling for leafy greens and a naturally ventilated polyhouse for vine crops.
Which crops should I grow in a polyhouse in Karur?
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 Karur?
It can be, if the crop, the structure and the buyers match. In Karur, capsicum and tomato 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 Karur?
Yes. Our nearest site is our factory and master warehouse at Degaon, Wai (Satara), about 900 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 Karur 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.
