Planning polyhouse farming in Karwar? Karwar is a town in Uttara Kannada District, Karnataka, home to about 77,000 people (GeoNames)[1][2], about 410 km from Pune. We have used the monthly climate for Karwar 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 Karwar
April is the hottest month in Karwar, with average daily highs of about 37°C. January has the coolest nights, averaging 18°C.[3] The area gets about 2,321 mm of rain a year, most of it in June to October, peaking in July at about 650 mm. Average humidity stays at 75% or more in June to December, which raises the risk of leaf disease and slows evaporative cooling. Karwar sits about 9 m above sea level.[2] On the Köppen–Geiger climate map, Karwar falls in the tropical monsoon zone (Am).[4]
Karwar climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
31.7
17.9
65
1
Feb
34.6
19.4
59
1
Mar
36.3
22.0
60
12
Apr
36.7
24.0
64
26
May
34.9
25.0
72
87
Jun
30.3
24.7
87
558
Jul
28.6
24.3
91
650
Aug
28.4
23.8
92
495
Sep
29.1
23.4
90
294
Oct
29.8
22.7
88
159
Nov
29.5
20.7
83
34
Dec
29.6
18.7
75
4
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Karwar, 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 Karwar
1
Year-round crops
Under cover, capsicum can be grown for the whole year in Karwar, 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 650 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 December), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Karnataka can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[6]
Which polyhouse suits Karwar?
For polyhouse farming in Karwar, the structure decides which months you can crop and what it costs to run. Average highs stay at 33°C or more in February to May, with moderate humidity of about 64%. In that dry air, wet pads can bring a 37°C April afternoon down to roughly 33°C inside a Fan & Pad polyhouse, which keeps herbs and vine crops going; lettuce will still struggle in the hottest weeks. Capsicum, cucumber and tomato do well in a naturally ventilated polyhouse with a shade screen. If you want one structure, decide by crop: greens all year point to Fan & Pad; vine crops point to a naturally ventilated house.
Plan for heavy rain in July (about 650 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in April at about 6.8 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 November to January, when it is mild and fairly dry.
Crops for Karwar
Based on Karwar's climate, the crops with the longest growing windows are capsicum (all year), tomato (all year) and cucumber (all year). Capsicum fits all year with Fan & Pad cooling. Lilium and carnation 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 Karwar.
Months each crop suits in Karwar
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Jun–Dec
All year
Tomato
Jun–Dec
All year
Cucumber
Jun–Jan
All year
Chilli pepper
Jun–Jan
All year
Brinjal
Jun–Jan
All year
Lettuce
Difficult
Jul–Feb
Broccoli
Difficult
Difficult
Strawberry
Difficult
Difficult
Rose
Difficult
Nov–Feb
Gerbera
Difficult
Sep–Feb
Carnation
Difficult
Difficult
Chrysanthemum
Difficult
Nov–Feb
Anthurium
Jul–Dec
May–Mar
Orchids
Jul–Dec
May–Mar
Lilium
Difficult
Difficult
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.
₹8,169Spending per person per month, urban Karnataka, 2023–24[7]
410 kmto Pune, the nearest metro (straight line)
Urban households in Karnataka spent an average of ₹8,169 per person per month in 2023–24, above the all-India urban average of ₹7,078.[7] Local demand in Karwar may be small for exotic greens, so plan where the rest of the harvest goes.
Polyhouse farming in Karwar with Kryzen
We have built 38 projects in Karnataka so far (see our project map (opens in a new tab)). Karwar is about 350 km in a straight line from our factory and master warehouse at Degaon, Wai (Satara), our nearest site.
Towns near Karwar
We also plan and build farms in these towns near Karwar:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Karwar: FAQs
Can a polyhouse farm run all year in Karwar?
Yes, with the right structure. For Karwar we would plan Fan & Pad cooling for leafy greens and a naturally ventilated polyhouse for vine crops. Even then, lettuce is hard to grow in March to June, so plan another crop for those months.
Which polyhouse is best for Karwar?
With April highs of about 37°C and 64% average humidity in that month, we would start with Fan & Pad cooling for leafy greens and a naturally ventilated polyhouse for vine crops.
Which crops should I grow in a polyhouse in Karwar?
Going by the monthly climate, capsicum, tomato and cucumber have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Karwar?
It can be, if the crop, the structure and the buyers match. In Karwar, capsicum and tomato 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 Karwar?
Yes. Our nearest site is our factory and master warehouse at Degaon, Wai (Satara), about 350 km away, and we have built 38 projects in Karnataka.
Is there a subsidy for polyhouse or hydroponic farms in Karnataka?
Yes. Protected cultivation projects in Karnataka 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 Karwar 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.
