Planning polyhouse farming in Sitamarhi? Sitamarhi is a town in Sitamarhi district, Bihar, home to about 68,000 people (GeoNames)[1][2], about 530 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 Sitamarhi
May is the hottest month in Sitamarhi, with average daily highs of about 40°C. January has the coolest nights, averaging 8°C.[3] The area gets about 1,145 mm of rain a year, most of it in June to September, peaking in July at about 315 mm. Average humidity stays at 75% or more in July to September, which raises the risk of leaf disease and slows evaporative cooling. Sitamarhi sits about 56 m above sea level.[2] On the Köppen–Geiger climate map, Sitamarhi falls in the humid subtropical with dry winters zone (Cwa).[4]
Sitamarhi climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
22.8
8.4
51
9
Feb
27.6
12.0
43
15
Mar
34.1
17.4
31
15
Apr
39.0
23.3
29
27
May
39.9
26.7
40
77
Jun
38.3
28.2
55
182
Jul
33.5
26.6
78
315
Aug
32.5
25.9
83
249
Sep
31.3
24.5
84
201
Oct
30.4
20.5
74
50
Nov
27.6
14.8
63
2
Dec
23.5
10.0
57
3
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Sitamarhi. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Sitamarhi
1
ఏడాది పొడవునా పంటలు
A polyhouse stretches the season: in Sitamarhi cucumber can be grown for about 9 months a year under cover, longer than in the open field.
2
మెరుగైన దిగుబడి మరియు ధర
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
తక్కువ నీరు
Drip irrigation under cover uses less water than flood irrigation, and the roof keeps July's 315 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
సబ్సిడీకి అర్హం
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 Sitamarhi?
For polyhouse farming in Sitamarhi, the structure decides which months you can crop and what it costs to run. The heat in Sitamarhi comes with dry air. In April to June, average highs reach 40°C while average humidity is only about 41%. In that dry air, wet pads can bring a 40°C May afternoon down to roughly 31°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 315 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 Sitamarhi
Based on Sitamarhi's climate, the crops with the longest growing windows are cucumber (9 months), chilli pepper (9 months) and brinjal (8 months). Cucumber fits March to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Sitamarhi.
Months each crop suits in Sitamarhi
పంట
సహజ వెంటిలేషన్ పాలీహౌస్
With Fan & Pad cooling
క్యాప్సికమ్
Feb and Oct–Nov
Feb–Apr and Aug–Nov
టమాటా
Feb and Oct–Dec
Feb–Apr and Sep–Dec
దోసకాయ
Jul–Nov
Mar–Nov
Chilli pepper
Feb and Aug–Nov
Feb–May and Jul–Nov
వంకాయ
Aug–Nov
Mar–May and Jul–Nov
లెట్యూస్
Nov–Feb
Oct–Apr
బ్రోకలీ
Dec–Jan
Nov–Mar
స్ట్రాబెర్రీ
Dec–Jan
Nov–Feb
గులాబీ
Feb and Nov–Dec
Feb–Mar and Oct–Dec
గెర్బెరా
Feb and Nov–Dec
Feb–Apr and Oct–Dec
కార్నేషన్
Dec–Jan
Nov–Mar
చామంతి
Feb and Nov–Dec
Feb–Mar and Oct–Dec
ఆంథూరియం
Difficult
Mar–May and Jul–Oct
ఆర్కిడ్లు
Difficult
Mar–May and Jul–Oct
లిలియం
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]
530 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 Sitamarhi may be small for exotic greens, so plan where the rest of the harvest goes. Muzaffarpur, about 50 km away, is the nearest larger market on our list.
Polyhouse farming in Sitamarhi with Kryzen
We have built 2 projects in Bihar so far (see our project map (కొత్త ట్యాబ్లో తెరుచుకుంటుంది)). Sitamarhi is about 1,280 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Sitamarhi
We also plan and build farms in these towns near Sitamarhi:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Sitamarhi: FAQs
Can a polyhouse farm run all year in Sitamarhi?
Yes, with the right structure. For Sitamarhi 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 Sitamarhi?
With May highs of about 40°C and 40% 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 Sitamarhi?
Going by the monthly climate, cucumber, chilli pepper and brinjal have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Sitamarhi?
It can be, if the crop, the structure and the buyers match. In Sitamarhi, 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 Sitamarhi?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,280 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 Sitamarhi 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.
