Besides the advantages of hydroponics, there are also some challenges associated with the usage of a hydroponic system in a greenhouse. Here below, we have summarised the cons of hydroponics and what can be done to solve or prevent these challenges.

• Challenge: Maintaining the right balance of nutrients in the hydroponic system and pH can be challenging if you don’t have the right equipments. Nutrient imbalances or deficiencies can lead to stunted growth, poor yields, and other plant health issues.
• Solution: Regular monitoring of nutrient levels and pH, adjusting the nutrient solution as needed, and using high-quality nutrient mixes can help overcome this challenge. In modern greenhouses, maintaining the right balance of nutrients, pH and EC (Electrical conductivity, says about how much ions of the nutrients are present in the nutrient solution) goes automatically.

• Challenge: While hydroponic systems can reduce the risk of soil-borne diseases in a well maintained greenhouse, the hydroponic crops are not immune to certain pests and diseases.
• Once a disease gets into the hydroponic system, it can spread to many plants through the shared nutrient solution which passes the root system. In a closed environment with a connected irrigation system and no disinfection machine, this can be a major risk for plant health.
• Solution: Implementing strict hygiene practices among workers, installing water disinfecting system (with UV light), installing insect nets at the windows of the greenhouse, regularly inspecting plants for signs of pests or diseases and optional: introducing beneficial insects (natural enemies of pests, such as parasitic wasps for caterpillars of butterflies and moths).

• Challenge: Hydroponic systems involve various technical components such as pumps, sensors, and climate control systems. Technical failures can disrupt the entire system and impact plant health.
• Solution: Regular maintenance, monitoring equipment functionality, and having contingency plans in place can minimize the risk of system failures. Training staff in troubleshooting and maintaining equipment is also very essential!

• Challenge: The initial cost of setting up a hydroponic system, including infrastructure, equipment, and technology, is higher compared to traditional soil-based cultivation.
• Solution: While the upfront costs are significant, the long-term benefits and increased yields often justify the investment. Growers can explore different system scales and designs to find a balance that suits their budget and production goals.