Materials Needed:
Plastic Bottles: Clean and empty plastic bottles with the tops removed. Larger bottles with a capacity of at least 2 liters work well.
Onion Sets or Onion Seeds: You can use onion sets (small bulbs) or seeds. Onion sets are a quicker option for harvesting.
Potting Mix: Use a well-draining potting mix suitable for container gardening. You can mix in some compost for added nutrients.
Watering Can or Hose: Ensure you have a consistent watering method