Planning polyhouse farming in Diphu? Diphu is a town in Assam, home to about 62,000 people (GeoNames)[1][2], about 630 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 Diphu
April is the hottest month in Diphu, with average daily highs of about 33°C. January has the coolest nights, averaging 10°C.[3] The area gets about 1,418 mm of rain a year, most of it in April to September, peaking in July at about 241 mm. Average humidity stays at 75% or more in June to November, which raises the risk of leaf disease and slows evaporative cooling. On the Köppen–Geiger climate map, Diphu falls in the humid subtropical with dry winters zone (Cwa).[4]
Diphu climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
22.9
10.1
69
9
Feb
26.6
12.3
63
21
Mar
31.3
16.3
56
49
Apr
33.1
20.4
65
140
May
33.1
22.8
73
202
Jun
32.5
24.5
81
237
Jul
31.8
24.8
84
241
Aug
31.8
24.9
84
221
Sep
30.7
23.9
85
175
Oct
28.9
20.8
82
91
Nov
26.3
15.7
78
21
Dec
23.6
11.8
74
11
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Diphu. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Diphu
1
Year-round crops
A polyhouse stretches the season: in Diphu cucumber 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 241 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 (June to November), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Assam can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Diphu?
For polyhouse farming in Diphu, the structure decides which months you can crop and what it costs to run. With average highs between 23°C and 33°C through the year, Diphu suits a naturally ventilated polyhouse for most crops. Fan & Pad cooling is rarely needed; spend the budget on good ventilation, insect net and a shade screen. Plan for heavy rain in July (about 241 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 to March and October to November, when it is mild and fairly dry.
Crops for Diphu
Based on Diphu's climate, the crops with the longest growing windows are cucumber (9 months), chilli pepper (9 months) and brinjal (7 months). Cucumber fits March to November in a naturally ventilated polyhouse. Lilium and orchids are hard to time here, so we would leave them out of the first season. These are the crops we would plan first for polyhouse farming in Diphu.
Months each crop suits in Diphu
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Feb and Sep–Dec
Feb–Dec
Tomato
Sep–Feb
All year
Cucumber
Mar–Nov
Mar–Nov
Chilli pepper
Feb–Mar and Jun–Dec
Feb–Dec
Brinjal
Mar and Jun–Nov
Mar–Nov
Lettuce
Nov–Feb
Sep–Apr
Broccoli
Dec–Jan
Nov–Feb
Strawberry
Dec–Jan
Dec–Feb
Rose
Nov–Feb
Oct–Apr
Gerbera
Nov–Feb
Oct–Apr
Carnation
Dec–Jan
Nov–Mar
Chrysanthemum
Nov–Feb
Oct–Apr
Anthurium
Oct–Nov
Mar–Nov
Orchids
Oct–Nov
Mar–Nov
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.
₹6,913Spending per person per month, urban Assam, 2023–24[6]
630 kmto Kolkata, the nearest metro (straight line)
Urban households in Assam spent an average of ₹6,913 per person per month in 2023–24, close to the all-India urban average of ₹7,078.[6] Local demand in Diphu may be small for exotic greens, so plan where the rest of the harvest goes.
Polyhouse farming in Diphu with Kryzen
We have built 2 projects in Assam so far (see our project map (opens in a new tab)). Diphu is about 1,970 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Diphu
We also plan and build farms in these towns near Diphu:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Diphu: FAQs
Can a polyhouse farm run all year in Diphu?
Yes, with the right structure. For Diphu we would plan a naturally ventilated polyhouse. Even then, lettuce is hard to grow in May to August, so plan another crop for those months.
Which polyhouse is best for Diphu?
With April highs of about 33°C and 65% average humidity in that month, we would start with a naturally ventilated polyhouse.
Which crops should I grow in a polyhouse in Diphu?
Going by the monthly climate, tomato, capsicum and chilli pepper have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Diphu?
It can be, if the crop, the structure and the buyers match. In Diphu, 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 Diphu?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,970 km away, and we have built 2 projects in Assam.
Is there a subsidy for polyhouse or hydroponic farms in Assam?
Yes. Protected cultivation projects in Assam 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 Diphu 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.
