Planning polyhouse farming in Salem? Salem is a large city in Salem district, Tamil Nadu, home to about 9.2 lakh people (GeoNames)[1][2], about 160 km from Bengaluru. This guide works from Salem'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 Salem
April is the hottest month in Salem, with average daily highs of about 38°C. January has the coolest nights, averaging 17°C.[3] The area gets about 804 mm of rain a year. The wettest months are September to November, peaking in October at about 161 mm. Average humidity stays at 75% or more in October to December, which raises the risk of leaf disease and slows evaporative cooling. Salem sits about 278 m above sea level.[2] On the Köppen–Geiger climate map, Salem falls in the tropical savanna (dry winter) zone (Aw).[4]
Salem climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
30.7
16.5
69
6
Feb
34.0
18.0
58
8
Mar
37.1
21.4
50
18
Apr
37.8
24.5
52
41
May
35.5
24.4
62
83
Jun
33.8
22.9
65
46
Jul
33.3
22.6
65
64
Aug
33.1
22.1
68
86
Sep
32.2
21.9
72
112
Oct
30.5
21.5
78
161
Nov
28.6
19.5
82
133
Dec
28.7
17.2
78
46
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Salem. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Salem
1
Year-round crops
Under cover, capsicum can be grown for the whole year in Salem, 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 161 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 Salem?
For polyhouse farming in Salem, 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 60%. 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 February and June to August, when it is mild and fairly dry.
Crops for Salem
Based on Salem'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 strawberry 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 Salem.
Months each crop suits in Salem
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Oct–Jan
All year
Tomato
Oct–Jan
All year
Cucumber
Jun–Feb
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
Oct–Feb
Gerbera
Difficult
Jul–Feb
Carnation
Difficult
Dec
Chrysanthemum
Difficult
Oct–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]
160 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] Salem 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 160 km away.
Polyhouse farming in Salem with Kryzen
We have built 9 projects in Tamil Nadu so far (see our project map (opens in a new tab)). Salem is about 840 km in a straight line from our factory and master warehouse at Degaon, Wai (Satara), our nearest site.
Towns near Salem
We also plan and build farms in these towns near Salem:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Salem: FAQs
Can a polyhouse farm run all year in Salem?
Yes, with the right structure. For Salem 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 Salem?
With April highs of about 38°C and 52% 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 Salem?
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 Salem?
It can be, if the crop, the structure and the buyers match. In Salem, 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 Salem?
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 Salem 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.
