Check the onions for signs of rot. Any damaged onions will not store well and the rot could spread to others nearby.
When the onions are ready shorten the leaves to about 15cm and trim the roots.
Don’t thread on too many onions as the string can get very heavy.
Click here to watch a youtube video of stringing onions for storage.
When you have finished hang the strings in a cool, dark, dry place and they should last for several months.