Planning polyhouse farming in Mariani? Mariani is a small town in Jorhat district, Assam, home to about 24,000 people (GeoNames)[1][2], about 750 km from Kolkata. This guide works from Mariani'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 Mariani
June is the hottest month in Mariani, with average daily highs of about 34°C. January has the coolest nights, averaging 11°C.[3] The area gets about 1,756 mm of rain a year, most of it in April to October, peaking in July at about 333 mm. Average humidity stays at 75% or more in June to November, which raises the risk of leaf disease and slows evaporative cooling. Mariani sits about 155 m above sea level.[2] On the Köppen–Geiger climate map, Mariani falls in the humid subtropical with dry winters zone (Cwa).[4]
Mariani climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
22.9
11.0
71
13
Feb
25.9
13.1
66
28
Mar
30.3
16.6
62
59
Apr
32.9
20.4
66
151
May
34.0
23.0
71
228
Jun
34.1
24.9
79
298
Jul
33.4
25.2
83
333
Aug
33.5
25.3
82
290
Sep
32.3
24.2
83
228
Oct
30.2
21.2
81
100
Nov
26.8
16.3
77
19
Dec
23.7
12.6
74
9
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Mariani, adjusted for the town's elevation[5]. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Mariani
1
Year-round crops
A polyhouse stretches the season: in Mariani cucumber can be grown for about 8 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 333 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.[6]
Which polyhouse suits Mariani?
For polyhouse farming in Mariani, the structure decides which months you can crop and what it costs to run. In Mariani the heat comes with humidity: during May to August average humidity is about 79%. Wet pads cool much less in humid air: on a typical June afternoon they would only bring 34°C down to about 32°C. So we usually start with a tall naturally ventilated polyhouse with wide roof vents, insect net and a shade screen. A Fan & Pad polyhouse still makes sense if buyers need lettuce through the hottest months, but expect a smaller temperature drop than in dry inland towns.
Plan for heavy rain in July (about 333 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 November, when it is mild and fairly dry.
Crops for Mariani
Based on Mariani's climate, the crops with the longest growing windows are cucumber (8 months), chilli pepper (7 months) and tomato (6 months). Cucumber fits March to May and July to November in a naturally ventilated polyhouse. Orchids and anthurium 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 Mariani.
Months each crop suits in Mariani
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Feb–Mar and Oct–Dec
Feb–Dec
Tomato
Oct–Mar
All year
Cucumber
Mar–May and Jul–Nov
Mar–Nov
Chilli pepper
Feb–Apr and Sep–Dec
Feb–Dec
Brinjal
Mar–Apr and Sep–Nov
Mar–Nov
Lettuce
Nov–Feb
Oct–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
Nov
Mar–May and Jul–Nov
Orchids
Nov
Mar–May and Jul–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[7]
750 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.[7] Local demand in Mariani may be small for exotic greens, so plan where the rest of the harvest goes.
Polyhouse farming in Mariani with Kryzen
We have built 2 projects in Assam so far (see our project map (opens in a new tab)). Mariani is about 2,080 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Mariani
We also plan and build farms in these towns near Mariani:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Mariani: FAQs
Can a polyhouse farm run all year in Mariani?
Yes, with the right structure. For Mariani we would plan a tall naturally ventilated polyhouse with wide vents and insect net. Even then, lettuce is hard to grow in May to September, so plan another crop for those months.
Which polyhouse is best for Mariani?
With June highs of about 34°C and 79% average humidity in that month, we would start with a tall naturally ventilated polyhouse with wide vents and insect net.
Which crops should I grow in a polyhouse in Mariani?
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 Mariani?
It can be, if the crop, the structure and the buyers match. In Mariani, 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 Mariani?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 2,080 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 Mariani 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.
