Growing coriander in a Styrofoam box with water is a hydroponic method, which involves cultivating plants without soil. Here’s a step-by-step guide on how to grow coriander hydroponically in a Styrofoam box:

Materials Needed:

  1. Styrofoam box or any suitable container
  2. Coriander seeds
  3. Hydroponic nutrient solution
  4. pH testing kit
  5. Net pots or any small containers for seedlings
  6. Growing medium (rock wool, perlite, or coconut coir)
  7. pH-adjusted water
  8. Grow lights (optional)
  9. Water pump (optional)
  10. Air stone (optional)


1. Set Up the Styrofoam Box:

  • Cut holes in the Styrofoam box to accommodate the net pots or small containers for the coriander seedlings.

2. Prepare the Nutrient Solution:

  • Mix the hydroponic nutrient solution according to the manufacturer’s instructions. Ensure it provides essential nutrients for the growth of coriander.

3. Adjust pH:

  • Use a pH testing kit to measure the pH of the nutrient solution. Coriander prefers a slightly acidic pH of around 6.0 to 6.7. Adjust the pH as needed using pH up or pH down solutions.

4. Plant Coriander Seeds:

  • Plant coriander seeds in the net pots or small containers filled with a growing medium such as rock wool, perlite, or coconut coir.

5. Place Net Pots in Styrofoam Holes:

  • Insert the net pots with coriander seeds into the holes in the Styrofoam box, ensuring that the seedlings are properly supported.

6. Add Nutrient Solution:

  • Pour the hydroponic nutrient solution into the Styrofoam box, ensuring that the roots of the coriander seedlings are submerged.

7. Provide Adequate Lighting:

  • Coriander plants require sufficient light for optimal growth. If growing indoors, provide natural sunlight or use grow lights to ensure the plants receive at least 12-16 hours of light each day.

8. Maintain Water Levels:

  • Check the water level regularly and top up with the nutrient solution as needed. Maintain a consistent water level to ensure continuous nutrient supply.

9. Aerate the Water (Optional):

  • To enhance oxygenation of the water, consider using a water pump and air stone. This is especially beneficial if growing coriander hydroponically in a closed system.

10. Monitor and Adjust:

  • Keep an eye on the overall health of the coriander plants. If you notice any nutrient deficiencies or imbalances, adjust the nutrient solution accordingly.

11. Harvesting:

  • Coriander is ready for harvest when the plants have developed sufficient leafy growth. Harvest by cutting the leaves, leaving the roots intact for possible regrowth.

Growing coriander hydroponically in a Styrofoam box provides a controlled environment for the plants, allowing them to thrive without soil. Ensure that you follow good hydroponic practices, including monitoring nutrient levels, pH, and lighting conditions for successful cultivation.