Planning polyhouse farming in Ramanathapuram? Ramanathapuram is a town in Ramanathapuram district, Tamil Nadu, home to about 65,000 people (GeoNames)[1][2], about 420 km from Bengaluru. We have used the monthly climate for Ramanathapuram 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 Ramanathapuram
April is the hottest month in Ramanathapuram, with average daily highs of about 34°C. January has the coolest nights, averaging 22°C.[3] The area gets about 969 mm of rain a year. The wettest months are October to November, peaking in November at about 224 mm. Average humidity stays at 75% or more in October to January, which raises the risk of leaf disease and slows evaporative cooling. Ramanathapuram sits about 2 m above sea level.[2] On the Köppen–Geiger climate map, Ramanathapuram falls in the tropical savanna (dry winter) zone (Aw).[4]
Ramanathapuram climate by month
Month
Avg high (°C)
Avg low (°C)
Humidity (%)
Rain (mm)
Jan
29.3
21.7
76
16
Feb
31.4
22.7
69
16
Mar
33.5
24.9
65
26
Apr
34.0
26.8
67
58
May
33.6
26.8
71
85
Jun
33.2
25.8
70
40
Jul
33.2
25.5
68
47
Aug
33.0
25.3
69
62
Sep
32.5
25.2
72
91
Oct
30.8
25.0
78
208
Nov
28.8
23.9
84
224
Dec
28.2
22.4
83
96
Area averages (a grid cell of about 50 km) for 2001–2025, from NASA POWER, centred on Ramanathapuram. Rainfall and night temperatures at your plot can differ, especially near hills and the coast.[3]
Advantages of protected cultivation in Ramanathapuram
1
Year-round crops
Under cover, cucumber can be grown for the whole year in Ramanathapuram, 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 November's 224 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 (October to January), so you spray less often.
5
Subsidy eligible
Polyhouse, shade net and nethouse projects in Tamil Nadu can apply for Mission for Integrated Development of Horticulture (MIDH) assistance through the state horticulture department.[5]
Which polyhouse suits Ramanathapuram?
For polyhouse farming in Ramanathapuram, the structure decides which months you can crop and what it costs to run. In Ramanathapuram the heat comes with humidity: during March to August average humidity is about 68%. Wet pads cool much less in humid air: on a typical April afternoon they would only bring 34°C down to about 30°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 November (about 224 mm): raise the plinth, size the gutters for that month and keep drains away from the nutrient tank. Sunlight peaks in March at about 6.3 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 December to September, when it is mild and fairly dry.
Crops for Ramanathapuram
Based on Ramanathapuram's climate, the crops with the longest growing windows are cucumber (all year), chilli pepper (7 months) and brinjal (7 months). Cucumber fits all year in a naturally ventilated polyhouse. Lilium and chrysanthemum 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 Ramanathapuram.
Months each crop suits in Ramanathapuram
Crop
Naturally ventilated polyhouse
With Fan & Pad cooling
Capsicum
Oct–Jan
Jun–Mar
Tomato
Oct–Jan
Jul–Mar
Cucumber
All year
All year
Chilli pepper
Aug–Feb
All year
Brinjal
Aug–Feb
All year
Lettuce
Difficult
Nov–Feb
Broccoli
Difficult
Difficult
Strawberry
Difficult
Difficult
Rose
Difficult
Difficult
Gerbera
Difficult
Dec–Feb
Carnation
Difficult
Difficult
Chrysanthemum
Difficult
Difficult
Anthurium
Nov–Jan
All year
Orchids
Nov–Jan
All year
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.
₹8,325Spending per person per month, urban Tamil Nadu, 2023–24[6]
420 kmto Bengaluru, the nearest metro (straight line)
Urban households in Tamil Nadu spent an average of ₹8,325 per person per month in 2023–24, above the all-India urban average of ₹7,078.[6] Local demand in Ramanathapuram may be small for exotic greens, so plan where the rest of the harvest goes. Karaikudi, about 80 km away, is the nearest larger market on our list.
Polyhouse farming in Ramanathapuram with Kryzen
We have built 9 projects in Tamil Nadu so far (see our project map (opens in a new tab)). Ramanathapuram is about 1,090 km in a straight line from our factory and master warehouse at Degaon, Wai (Satara), our nearest site.
Towns near Ramanathapuram
We also plan and build farms in these towns near Ramanathapuram:
Map: LGD 2024 boundaries via bharatlas, CC BY 4.0. For illustration only.
Polyhouse farming in Ramanathapuram: FAQs
Can a polyhouse farm run all year in Ramanathapuram?
Yes, with the right structure. For Ramanathapuram we would plan a tall naturally ventilated polyhouse with wide vents and insect net. Even then, lettuce is hard to grow in March to October, so plan another crop for those months.
Which polyhouse is best for Ramanathapuram?
With April highs of about 34°C and 67% 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 Ramanathapuram?
Going by the monthly climate, cucumber, chilli pepper and brinjal have the longest growing windows. Confirm prices and volumes with buyers before you plant.
Is polyhouse farming profitable in Ramanathapuram?
It can be, if the crop, the structure and the buyers match. In Ramanathapuram, 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 Ramanathapuram?
Yes. Our nearest site is our factory and master warehouse at Degaon, Wai (Satara), about 1,090 km away, and we have built 9 projects in Tamil Nadu.
Is there a subsidy for polyhouse or hydroponic farms in Tamil Nadu?
Yes. Protected cultivation projects in Tamil Nadu 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 Ramanathapuram 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.
