Planning polyhouse farming in Katihar? Katihar is a mid-sized city in Katihar district, Bihar, home to about 2.4 lakh people (GeoNames)[1][2], about 340 km from Kolkata. We have used the monthly climate for Katihar 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 Katihar
May is the hottest month in Katihar, with average daily highs of about 39°C. January has the coolest nights, averaging 9°C.[3] The area gets about 1,230 mm of rain a year, most of it in May to September, peaking in July at about 309 mm. Average humidity stays at 75% or more in July to October, which raises the risk of leaf disease and slows evaporative cooling. Katihar sits about 20 m above sea level.[2] On the Köppen–Geiger climate map, Katihar falls in the humid subtropical with dry winters zone (Cwa).[4]
Katihar climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
23.1
8.5
55
7
Feb
28.2
12.4
45
9
Mar
34.4
17.9
35
17
Apr
38.5
23.4
38
50
May
38.6
26.3
51
114
Jun
36.3
27.4
67
191
Jul
32.3
26.3
84
309
Aug
31.7
25.9
86
222
Sep
30.8
24.8
87
220
Oct
29.6
21.0
80
85
Nov
26.7
15.2
73
4
Dec
23.2
10.3
66
2
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Katihar. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Katihar
1
साल भर फ़सलें
Under cover, chilli pepper can be grown for 10 months a year in Katihar, so you can supply buyers every week instead of one open-field season.
2
बेहतर उपज और दाम
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
कम पानी
Drip irrigation under cover uses less water than flood irrigation, and the roof keeps July's 309 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
सब्सिडी के लिए पात्र
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 Katihar?
For polyhouse farming in Katihar, the structure decides which months you can crop and what it costs to run. The heat in Katihar comes with dry air. In April to May, average highs reach 39°C while average humidity is only about 45%. In that dry air, wet pads can bring a 39°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 309 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. 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 Katihar
Based on Katihar's climate, the crops with the longest growing windows are chilli pepper (10 months), capsicum (9 months) and cucumber (9 months). Chilli pepper fits February to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Katihar.
Months each crop suits in Katihar
फ़सल
नेचुरली वेंटिलेटेड पॉलीहाउस
With Fan & Pad cooling
शिमला मिर्च
Feb and Sep–Nov
Feb–May and Jul–Nov
टमाटर
Feb and Sep–Dec
Feb–Apr and Sep–Dec
खीरा
Jul–Nov
Mar–Nov
Chilli pepper
Feb and Jul–Nov
Feb–Nov
बैंगन
Jul–Nov
Mar–Nov
लेट्यूस
Nov–Jan
Oct–Apr
ब्रोकली
Dec–Jan
Nov–Feb
स्ट्रॉबेरी
Dec–Jan
Nov–Feb
गुलाब
Nov–Dec
Feb–Mar and Oct–Dec
जरबेरा
Nov–Dec
Feb–Apr and Oct–Dec
कार्नेशन
Dec–Jan
Nov–Feb
गुलदाउदी
Nov–Dec
Feb–Mar and Oct–Dec
एंथूरियम
Oct
Mar–Apr and Jul–Oct
ऑर्किड
Oct
Mar–Apr and Jul–Oct
लिलियम
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] Katihar 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.
Polyhouse farming in Katihar with Kryzen
We have built 2 projects in Bihar so far (see our project map (नए टैब में खुलता है)). Katihar is about 1,400 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Katihar
We also plan and build farms in these towns near Katihar:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Katihar: FAQs
Can a polyhouse farm run all year in Katihar?
Yes, with the right structure. For Katihar we would plan a Fan & Pad polyhouse for leafy greens. Even then, lettuce is hard to grow in May to September, so plan another crop for those months.
Which polyhouse is best for Katihar?
With May highs of about 39°C and 51% 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 Katihar?
Going by the monthly climate, chilli pepper, capsicum and cucumber have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Katihar?
It can be, if the crop, the structure and the buyers match. In Katihar, 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 Katihar?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,400 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 Katihar 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.
