Planning polyhouse farming in Adra? Adra is a small town in Purulia district, West Bengal, home to about 22,000 people (GeoNames)[1][2], about 200 km from Kolkata. We have used the monthly climate for Adra to plan a structure, a growing system and a crop calendar, so you can compare them with your own plot and buyers.
Climate for polyhouse farming in Adra
May is the hottest month in Adra, with average daily highs of about 39°C. January has the coolest nights, averaging 9°C.[3] The area gets about 1,405 mm of rain a year, most of it in May to September, peaking in July at about 327 mm. Average humidity stays at 75% or more in July to October, which raises the risk of leaf disease and slows evaporative cooling. On the Köppen–Geiger climate map, Adra falls in the tropical savanna (dry winter) zone (Aw).[4]
Adra climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
23.3
9.1
62
12
Feb
28.2
13.0
54
14
Mar
34.2
18.2
44
22
Apr
39.2
23.3
44
47
May
39.3
25.9
54
118
Jun
35.5
26.5
70
220
Jul
31.8
25.4
84
327
Aug
30.9
25.0
87
292
Sep
30.2
24.2
88
237
Oct
29.2
20.8
81
99
Nov
26.5
15.1
74
9
Dec
23.2
10.3
70
8
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Adra. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Adra
1
Year-round crops
Under cover, chilli pepper can be grown for 10 months a year in Adra, 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 July's 327 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 (July to October), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in West Bengal can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Adra?
For polyhouse farming in Adra, the structure decides which months you can crop and what it costs to run. The heat in Adra comes with dry air. In April to May, average highs reach 39°C while average humidity is only about 49%. In that dry air, wet pads can bring a 39°C May afternoon down to roughly 33°C inside a Fan & Pad polyhouse, which keeps herbs and vine crops going; lettuce will still struggle in the hottest weeks. For vine crops such as capsicum and cucumber, a naturally ventilated polyhouse with a shade screen works from February and August to November and costs less to run.
Plan for heavy rain in July (about 327 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in April at about 6.3 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 February and October to November, when it is mild and fairly dry.
Crops for Adra
Based on Adra's climate, the crops with the longest growing windows are chilli pepper (10 months), capsicum (9 months) and tomato (9 months). Chilli pepper fits February to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Adra.
Months each crop suits in Adra
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Feb and Aug–Nov
Feb–Apr and Jun–Nov
Tomato
Feb and Aug–Dec
Feb–Apr and Jul–Dec
Cucumber
Jul–Nov
Mar–Nov
Chilli pepper
Feb and Jul–Nov
Feb–Nov
Brinjal
Jul–Nov
Mar–Nov
Lettuce
Nov–Jan
Sep–Mar
Broccoli
Dec–Jan
Nov–Feb
Strawberry
Dec–Jan
Nov–Feb
Rose
Nov–Dec
Feb–Mar and Oct–Dec
Gerbera
Nov–Dec
Feb–Mar and Oct–Dec
Carnation
Dec–Jan
Nov–Feb
Chrysanthemum
Nov–Dec
Feb–Mar and Oct–Dec
Anthurium
Oct
Mar–Apr and Jul–Oct
Orchids
Oct
Mar–Apr and Jul–Oct
Lilium
Dec–Jan
Nov–Feb
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.
₹5,903Spending per person per month, urban West Bengal, 2023–24[6]
200 kmto Kolkata, the nearest metro (straight line)
Urban households in West Bengal spent an average of ₹5,903 per person per month in 2023–24, below the all-India urban average of ₹7,078.[6] Local demand in Adra may be small for exotic greens, so plan where the rest of the harvest goes. Asansol, about 40 km away, is the nearest larger market on our list. For premium vegetable and flower buyers, Kolkata is within a day's delivery, about 200 km away.
Polyhouse farming in Adra with Kryzen
We have built 2 projects in West Bengal so far (see our project map (opens in a new tab)). Adra is about 1,240 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Adra
We also plan and build farms in these towns near Adra:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Adra: FAQs
Can a polyhouse farm run all year in Adra?
Yes, with the right structure. For Adra we would plan a Fan & Pad polyhouse for leafy greens. Even then, lettuce is hard to grow in April to August, so plan another crop for those months.
Which polyhouse is best for Adra?
With May highs of about 39°C and 54% average humidity in that month, we would start with a Fan & Pad polyhouse for leafy greens.
Which crops should I grow in a polyhouse in Adra?
Going by the monthly climate, chilli pepper, capsicum and tomato have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Adra?
It can be, if the crop, the structure and the buyers match. In Adra, chilli pepper and capsicum 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 Adra?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,240 km away, and we have built 2 projects in West Bengal.
Is there a subsidy for polyhouse or hydroponic farms in West Bengal?
Yes. Protected cultivation projects in West Bengal 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 Adra 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.
