Step 4: Finish
Remove old onion scales.
Separate plants as needed by slicing between plants and leaving a portion of the roots attached. You may have more than 1 plant develop from a single onion bottom.
Replant in a prepared growing bed.
Cut leaves down to 1/3 of the size to allow the bulb to develop. This might seem harsh, but the onion will regrow those leaves with less stress.
Repeat the process. Harvest as green onions or fully developed mature onions.