Planning polyhouse farming in Bagaha? Bagaha is a mid-sized city in West Champaran district, Bihar, home to about 1.1 lakh people (GeoNames)[1][2], about 660 km from Kolkata. Below we use the town's monthly temperatures, humidity and rainfall to work out which structure fits, which crops to grow and in which months, before you spend on construction.
Climate for polyhouse farming in Bagaha
May is the hottest month in Bagaha, with average daily highs of about 40°C. January has the coolest nights, averaging 8°C.[3] The area gets about 1,241 mm of rain a year, most of it in June to September, peaking in July at about 352 mm. Average humidity stays at 75% or more in July to September, which raises the risk of leaf disease and slows evaporative cooling. Bagaha sits about 135 m above sea level.[2] On the Köppen–Geiger climate map, Bagaha falls in the humid subtropical with dry winters zone (Cwa).[4]
Bagaha climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
22.0
8.2
52
13
Feb
26.8
11.7
44
18
Mar
33.3
17.0
33
18
Apr
38.9
23.1
27
29
May
40.0
26.4
37
83
Jun
38.4
28.0
53
201
Jul
33.5
26.5
78
352
Aug
32.3
25.8
83
271
Sep
31.1
24.3
83
199
Oct
29.9
20.3
73
51
Nov
26.6
14.6
63
2
Dec
22.7
9.7
57
4
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Bagaha. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Bagaha
1
Year-round crops
A polyhouse stretches the season: in Bagaha capsicum can be grown for about 9 months a year under cover, longer than in the open field.
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 352 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 September), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Bihar can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Bagaha?
For polyhouse farming in Bagaha, the structure decides which months you can crop and what it costs to run. The heat in Bagaha comes with dry air. In April to June, average highs reach 40°C while average humidity is only about 39%. In that dry air, wet pads can bring a 40°C May afternoon down to roughly 30°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 October to November and costs less to run.
Plan for heavy rain in July (about 352 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in April at about 6.5 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 February to March and October to November, when it is mild and fairly dry.
Crops for Bagaha
Based on Bagaha's climate, the crops with the longest growing windows are capsicum (9 months), cucumber (9 months) and chilli pepper (9 months). Capsicum fits February to May and July to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Bagaha.
Months each crop suits in Bagaha
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Feb and Oct–Nov
Feb–May and Jul–Nov
Tomato
Feb and Oct–Dec
Feb–Apr and Sep–Dec
Cucumber
Mar and Jul–Nov
Mar–Nov
Chilli pepper
Feb and Aug–Nov
Feb–May and Jul–Nov
Brinjal
Aug–Nov
Mar–May and Jul–Nov
Lettuce
Nov–Feb
Sep–Apr
Broccoli
Dec–Jan
Nov–Mar
Strawberry
Dec–Jan
Nov–Feb
Rose
Feb and Nov–Dec
Feb–Mar and Oct–Dec
Gerbera
Feb and Nov–Dec
Feb–Apr and Oct–Dec
Carnation
Dec–Jan
Nov–Mar
Chrysanthemum
Feb and Nov–Dec
Feb–Mar and Oct–Dec
Anthurium
Oct
Mar–May and Jul–Oct
Orchids
Oct
Mar–May and Jul–Oct
Lilium
Dec–Jan
Nov–Mar
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.
₹5,165Spending per person per month, urban Bihar, 2023–24[6]
660 kmto Kolkata, the nearest metro (straight line)
Urban households in Bihar spent an average of ₹5,165 per person per month in 2023–24, below the all-India urban average of ₹7,078.[6] Local demand in Bagaha may be small for exotic greens, so plan where the rest of the harvest goes.
Polyhouse farming in Bagaha with Kryzen
We have built 2 projects in Bihar so far (see our project map (opens in a new tab)). Bagaha is about 1,200 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Bagaha
We also plan and build farms in these towns near Bagaha:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Bagaha: FAQs
Can a polyhouse farm run all year in Bagaha?
Yes, with the right structure. For Bagaha we would plan a Fan & Pad polyhouse for leafy greens. Even then, lettuce is hard to grow in May to August, so plan another crop for those months.
Which polyhouse is best for Bagaha?
With May highs of about 40°C and 37% 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 Bagaha?
Going by the monthly climate, capsicum, cucumber and chilli pepper have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Bagaha?
It can be, if the crop, the structure and the buyers match. In Bagaha, capsicum and cucumber 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 Bagaha?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,200 km away, and we have built 2 projects in Bihar.
Is there a subsidy for polyhouse or hydroponic farms in Bihar?
Yes. Protected cultivation projects in Bihar 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 Bagaha 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.
