Planning polyhouse farming in Nahan? Nahan is a small town in Sirmaur district, Himachal Pradesh, home to about 29,000 people (GeoNames)[1][2], about 220 km from Delhi. We have used the monthly climate for Nahan 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 Nahan
May is the hottest month in Nahan, with average daily highs of about 37°C. January has the coolest nights, averaging 6°C.[3] The area gets about 1,355 mm of rain a year, most of it in June to September, peaking in August at about 381 mm. Average humidity stays at 75% or more in August to September, which raises the risk of leaf disease and slows evaporative cooling. Nahan sits about 932 m above sea level, so nights run cooler than in the plains around it.[2] On the Köppen–Geiger climate map, Nahan falls in the humid subtropical with dry winters zone (Cwa).[4]
Nahan climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
17.7
5.8
46
39
Feb
20.9
8.0
47
47
Mar
26.6
12.0
41
40
Apr
32.8
17.6
33
32
May
37.0
22.1
29
45
Jun
36.6
24.3
44
172
Jul
31.4
23.6
73
379
Aug
29.0
22.6
82
381
Sep
28.2
20.1
77
184
Oct
26.7
15.0
60
18
Nov
23.0
10.8
48
6
Dec
19.4
7.3
44
12
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Nahan. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Nahan
1
Year-round crops
A polyhouse stretches the season: in Nahan chilli pepper can be grown for about 6 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 August's 381 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 (August to September), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Himachal Pradesh can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Nahan?
For polyhouse farming in Nahan, the structure decides which months you can crop and what it costs to run. Cold, not heat, sets the limits in Nahan: average lows fall to 6°C in January, and nights stay at 8°C or below in December to February. A naturally ventilated polyhouse with roll-up side curtains traps daytime warmth; close the curtains at night in those months. Summer highs reach about 37°C in May, so roof vents and a shade screen are enough. Fan & Pad cooling is rarely worth its running cost here.
Plan for heavy rain in August (about 381 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in May at about 7.1 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 March to April and October, when it is mild and fairly dry.
Crops for Nahan
Based on Nahan's climate, the crops with the longest growing windows are chilli pepper (6 months), lettuce (6 months) and tomato (5 months). Chilli pepper fits March to April and July to October 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 Nahan.
Months each crop suits in Nahan
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Mar and Aug–Oct
Mar–Oct
Tomato
Mar and Aug–Nov
Mar–Nov
Cucumber
Apr and Jul–Oct
Apr–Oct
Chilli pepper
Mar–Apr and Jul–Oct
Mar–Oct
Brinjal
Apr and Jul–Oct
Apr–Oct
Lettuce
Oct–Mar
All year
Broccoli
Nov–Feb
Oct–Mar
Strawberry
Nov–Feb
Oct–Mar
Rose
Mar and Oct–Nov
Mar–Apr and Sep–Nov
Gerbera
Mar and Oct–Nov
Mar–May and Aug–Nov
Carnation
Feb and Nov
Feb–Mar and Oct–Nov
Chrysanthemum
Mar and Oct–Nov
Mar–Apr and Sep–Nov
Anthurium
Aug–Sep
Apr–Sep
Orchids
Aug–Sep
Apr–Sep
Lilium
Feb and Nov
Feb–Mar and Oct–Nov
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.
₹9,230Spending per person per month, urban Himachal Pradesh, 2023–24[6]
220 kmto Delhi, the nearest metro (straight line)
Urban households in Himachal Pradesh spent an average of ₹9,230 per person per month in 2023–24, above the all-India urban average of ₹7,078.[6] Local demand in Nahan may be small for exotic greens, so plan where the rest of the harvest goes. Panchkula, about 40 km away, is the nearest larger market on our list. For premium vegetable and flower buyers, Delhi is within a day's delivery, about 220 km away.
Polyhouse farming in Nahan with Kryzen
We have built 2 projects in Himachal Pradesh so far (see our project map (opens in a new tab)). Nahan is about 1,200 km in a straight line from our Chhatrapati Sambhajinagar warehouse, our nearest site.
Towns near Nahan
We also plan and build farms in these towns near Nahan:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Nahan: FAQs
Can a polyhouse farm run all year in Nahan?
Yes, with the right structure. For Nahan we would plan a naturally ventilated polyhouse with roll-up curtains closed on cold nights.
Which polyhouse is best for Nahan?
With May highs of about 37°C and 29% average humidity in that month, we would start with a naturally ventilated polyhouse with roll-up curtains closed on cold nights.
Which crops should I grow in a polyhouse in Nahan?
Going by the monthly climate, lettuce, tomato and capsicum have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Nahan?
It can be, if the crop, the structure and the buyers match. In Nahan, chilli pepper and lettuce 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 Nahan?
Yes. Our nearest site is our Chhatrapati Sambhajinagar warehouse, about 1,200 km away, and we have built 2 projects in Himachal Pradesh.
Is there a subsidy for polyhouse or hydroponic farms in Himachal Pradesh?
Yes. Protected cultivation projects in Himachal Pradesh 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 Nahan 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.
