Planning polyhouse farming in Dumka? Dumka is a town in Dumka district, Jharkhand, home to about 48,000 people (GeoNames)[1][2], about 220 km from Kolkata. This guide works from Dumka's own monthly climate to suggest the protected structure, the crops to start with, and the months each crop is likely to do well.
Climate for polyhouse farming in Dumka
April is the hottest month in Dumka, with average daily highs of about 39°C. January has the coolest nights, averaging 9°C.[3] The area gets about 1,233 mm of rain a year, most of it in May to October, peaking in July at about 281 mm. Average humidity stays at 75% or more in July to October, which raises the risk of leaf disease and slows evaporative cooling. Dumka sits about 137 m above sea level.[2] On the Köppen–Geiger climate map, Dumka falls in the humid subtropical with dry winters zone (Cwa).[4]
Dumka climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
23.4
8.7
56
8
Feb
28.7
12.8
46
10
Mar
34.9
18.3
35
19
Apr
39.0
23.3
40
49
May
38.6
25.7
54
118
Jun
35.5
26.5
70
188
Jul
31.8
25.6
85
281
Aug
31.0
25.3
87
224
Sep
30.2
24.4
88
222
Oct
29.1
20.8
82
104
Nov
26.4
14.9
74
6
Dec
23.3
10.1
66
4
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Dumka. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Dumka
1
Year-round crops
Under cover, capsicum can be grown for 10 months a year in Dumka, 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 281 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 Jharkhand can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Dumka?
For polyhouse farming in Dumka, the structure decides which months you can crop and what it costs to run. The heat in Dumka comes with dry air. In April to May, average highs reach 39°C while average humidity is only about 47%. In that dry air, wet pads can bring a 39°C April 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 August to November and costs less to run.
Plan for heavy rain in July (about 281 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank.
Crops for Dumka
Based on Dumka's climate, the crops with the longest growing windows are capsicum (10 months), chilli pepper (10 months) and cucumber (9 months). Capsicum fits February to November with Fan & Pad cooling. These are the crops we would plan first for polyhouse farming in Dumka.
Months each crop suits in Dumka
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Feb and Aug–Nov
Feb–Nov
Tomato
Feb and Aug–Dec
Feb–Apr and Aug–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.
₹5,455Spending per person per month, urban Jharkhand, 2023–24[6]
220 kmto Kolkata, the nearest metro (straight line)
Urban households in Jharkhand spent an average of ₹5,455 per person per month in 2023–24, below the all-India urban average of ₹7,078.[6] Local demand in Dumka may be small for exotic greens, so plan where the rest of the harvest goes. Deoghar, about 60 km away, is the nearest larger market on our list. For premium vegetable and flower buyers, Kolkata is within a day's delivery, about 220 km away.
Polyhouse farming in Dumka with Kryzen
We have built 2 projects in Jharkhand so far (see our project map (opens in a new tab)). Dumka is about 1,320 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Dumka
We also plan and build farms in these towns near Dumka:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Dumka: FAQs
Can a polyhouse farm run all year in Dumka?
Yes, with the right structure. For Dumka 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 Dumka?
With April highs of about 39°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 Dumka?
Going by the monthly climate, capsicum, chilli pepper and cucumber have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Dumka?
It can be, if the crop, the structure and the buyers match. In Dumka, capsicum 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 Dumka?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,320 km away, and we have built 2 projects in Jharkhand.
Is there a subsidy for polyhouse or hydroponic farms in Jharkhand?
Yes. Protected cultivation projects in Jharkhand 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 Dumka 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.
