Growing in Recirculating Hydro Systems

Recirculating hydroponic systems, particularly Recirculating Deep Water Culture (RDWC), offer an efficient way to grow plants in a water-rich environment without the use of soil. In these systems, plants are grown in containers or net pots filled with a growing medium such as rock wool, perlite, or coconut fiber. These containers are placed in a larger reservoir filled with nutrient solution. The nutrient solution is pumped through the system or flows through the container, providing the plants with the necessary nutrients.

A core component of RDWC (Recirculating Deep Water Culture) systems is oxygen supply to the roots. Since the roots are continuously submerged in water, it's crucial to use high-quality air stones and an air pump to oxygenate the water and nutrient solution. The air stones create small bubbles that increase the dissolved oxygen level in the solution, which is essential for healthy plant cultivation and root growth.

Another important aspect of RDWC is water temperature. Experts agree that the ideal water temperature for hydroponics is between 18°C and 25°C (64°F to 77°F). This temperature range allows plants to thrive and ensures an ideal environment for healthy roots and oxygen-rich nutrient uptake.

Benefits of RDWC

Efficient Water Use

One of the major advantages of RDWC is the efficiency in water use. Due to recirculation, significantly less water is required than traditional cultivation methods, making RDWC a sustainable option, especially in areas with water scarcity.

Controlled Nutrients

RDWC offers complete control over the nutrient balance, allowing plants to receive exactly what they need for optimal growth. This precision in nutrient management can lead to faster growth and higher yields.

Less Maintenance

Due to the closed system and the automation of nutrient and oxygen supply, RDWC requires less daily maintenance than other cultivation methods.

Drawbacks of RDWC

Startup Costs

The initial investment in an RDWC system can be high, given the necessary equipment such as pumps, air stones, and a suitable reservoir.

Technical Knowledge

A certain level of technical knowledge is required for successfully setting up and maintaining an RDWC system. Monitoring the pH value and nutrient concentrations is crucial and can be challenging for beginners.

The Added Value of DutchGrow Products


DutchGrow offers significant added value with its Aqua line, specifically designed for hydroponic systems. These products, including Aqua Grow A&B for the growth phase and Aqua Bloom A&B for the flowering phase, are formulated to meet the unique nutritional needs of plants in different growth stages.

Benefits of DutchGrow in RDWC
  • pH Stabilization: DutchGrow products contain pH stabilizers, which facilitate the management of the nutrient solution and eliminate the need for constant adjustments.
  • Specific Nutrient Formulas: The separate A&B components of DutchGrow prevent nutrient precipitation, optimizing absorption by the plant.
  • Enhanced Plant Health: These products are designed to improve plant health, focusing on strong root development and lush growth.

In summary

RDWC offers an efficient, water-saving method for modern horticulture, with the potential for higher yields and faster growth. Although the technique requires an initial investment and learning curve, the addition of specialized nutrients like those from DutchGrow can elevate the system to a higher level.

DutchGrow producten voor RDWC systemen

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