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To start this process, Dr. Obi recommends cutting the bottom one-third of an onion bulb. This portion will serve as the foundation for your new onion plants, while the remaining two-thirds can be utilized in cooking. After you’ve sliced the onion, remove the papery outer layers and trim any dried-up roots to prepare your planting material.
Setting Up the Growing Environment
Next, Dr. Obi demonstrates how to set up a simple growing container. You can use a plastic bottle with the top section cut off, or a glass cup. Fill it almost to the brim with clean water, making sure to place the onion bottom in such a way that the cut end is submerged in the water. If the onion piece is small, toothpicks can be inserted strategically to keep it above the water’s surface.