Hydroponic farming in India: systems, crops and costs

Part 1

What hydroponics is

Hydroponics grows plants without soil. The roots sit in water or an inert medium such as cocopeat, clay balls or rockwool, and every nutrient the plant needs is dissolved in the water. Growers control the nutrient strength (measured as EC) and acidity (pH) instead of managing soil.

The benefits are fast, clean growth and high output per square foot, which is why it suits terraces, balconies and city farms. The trade-off is that the system depends on pumps, power and regular monitoring.

Part 2

The main systems

NFT (nutrient film technique) runs a thin stream of solution along channels and suits leafy greens. Deep water culture floats plants on rafts over an aerated tank. Dutch buckets and drip systems suit larger fruiting plants such as tomatoes and capsicum. Vertical towers, including aeroponic towers that mist the roots, grow many plants on a small footprint and are the usual choice for homes.

Part 3

What grows well

Lettuce, spinach, pak choi, kale, basil, mint, coriander and other herbs grow fastest and are the easiest to start with. Cherry tomatoes, capsicum, cucumber and strawberries also do well but need support, more light and closer attention to nutrients. Root crops such as potato and carrot are not suited to most small systems.

Part 4

Home towers and commercial farms

A home tower installed with the first set of seedlings runs on a small pump and a timer; ask us on WhatsApp for the price installed. It needs four to six hours of sun or a grow light, and a refill of nutrients and seedlings every season.

Commercial hydroponic farms are a different investment. The greenhouse or polyhouse, cooling in Indian summers, water treatment and labour usually cost more than the growing channels themselves, and profit depends on having buyers for the produce before you build. Plan the sales side first.