Planning polyhouse farming in Jamui? Jamui is a town in Jamui district, Bihar, home to about 87,000 people (GeoNames)[1][2], about 340 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 Jamui
May is the hottest month in Jamui, with average daily highs of about 41°C. January has the coolest nights, averaging 8°C.[3] The area gets about 1,036 mm of rain a year, most of it in June to September, peaking in July at about 285 mm. Average humidity stays at 75% or more in July to October, which raises the risk of leaf disease and slows evaporative cooling. Jamui sits about 78 m above sea level.[2] On the Köppen–Geiger climate map, Jamui falls in the humid subtropical with dry winters zone (Cwa).[4]
Jamui climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
23.1
8.4
52
11
Feb
28.2
12.4
44
12
Mar
34.5
18.0
32
12
Apr
39.6
23.7
31
22
May
40.7
27.0
41
59
Jun
38.0
28.1
57
158
Jul
32.7
26.1
80
285
Aug
31.6
25.5
85
219
Sep
30.7
24.4
85
190
Oct
29.6
20.5
78
63
Nov
26.8
14.5
68
2
Dec
23.4
9.8
61
3
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Jamui. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Jamui
1
આખું વર્ષ પાક
A polyhouse stretches the season: in Jamui cucumber can be grown for about 9 months a year under cover, longer than in the open field.
2
વધુ સારું ઉત્પાદન અને ભાવ
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
ઓછું પાણી
Drip irrigation under cover uses less water than flood irrigation, and the roof keeps July's 285 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
સબસિડી પાત્ર
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 Jamui?
For polyhouse farming in Jamui, the structure decides which months you can crop and what it costs to run. The heat in Jamui comes with dry air. In April to June, average highs reach 41°C while average humidity is only about 43%. In that dry air, wet pads can bring a 41°C May 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. For vine crops such as capsicum and cucumber, a naturally ventilated polyhouse with a shade screen works from February and September to November and costs less to run.
Plan for heavy rain in July (about 285 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in April at about 6.4 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 February and October to November, when it is mild and fairly dry.
Crops for Jamui
Based on Jamui's climate, the crops with the longest growing windows are cucumber (9 months), chilli pepper (9 months) and capsicum (8 months). Cucumber fits March to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Jamui.
Months each crop suits in Jamui
પાક
નેચરલી વેન્ટિલેટેડ પોલીહાઉસ
With Fan & Pad cooling
કેપ્સિકમ
Feb and Sep–Nov
Feb–Apr and Jul–Nov
ટામેટાં
Feb and Sep–Dec
Feb–Apr and Aug–Dec
કાકડી
Jul–Nov
Mar–Nov
Chilli pepper
Feb and Jul–Nov
Feb–May and Jul–Nov
રીંગણ
Jul–Nov
Mar–May and Jul–Nov
લેટ્યુસ
Nov–Jan
Sep–Apr
બ્રોકોલી
Dec–Jan
Nov–Feb
સ્ટ્રોબેરી
Dec–Jan
Nov–Feb
ગુલાબ
Nov–Dec
Feb–Mar and Oct–Dec
જર્બેરા
Nov–Dec
Feb–Mar and Oct–Dec
કાર્નેશન
Dec–Jan
Nov–Feb
સેવંતી
Nov–Dec
Feb–Mar and Oct–Dec
એન્થુરિયમ
Oct
Mar–May and Jul–Oct
ઓર્કિડ
Oct
Mar–May and Jul–Oct
લિલિયમ
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.
₹5,165Spending per person per month, urban Bihar, 2023–24[6]
340 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 Jamui may be small for exotic greens, so plan where the rest of the harvest goes. Begusarai, about 60 km away, is the nearest larger market on our list.
Polyhouse farming in Jamui with Kryzen
We have built 2 projects in Bihar so far (see our project map (નવા ટેબમાં ખૂલે છે)). Jamui is about 1,250 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Jamui
We also plan and build farms in these towns near Jamui:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Jamui: FAQs
Can a polyhouse farm run all year in Jamui?
Yes, with the right structure. For Jamui 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 Jamui?
With May highs of about 41°C and 41% 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 Jamui?
Going by the monthly climate, cucumber, chilli pepper and capsicum have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Jamui?
It can be, if the crop, the structure and the buyers match. In Jamui, 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 Jamui?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,250 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 Jamui 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.
