Folding the tops of onion is a great way to prepare them for storage through the winter months. If you are interested in using your summer harvest for chili, soups, etc., then take note! Onions are ready to be folded when their tops are yellow. Once brown, they are officially ready for harvest and storage!
Key Takeaways:
- If you plan to use the onions right away, folding onion tops isn’t really necessary.
- Fold or bend onion tops when the onion begins to turn yellow and fall over on their own
- rolling down onion tops encourages the onion to turn brown and stop taking up water, thus boosting the final process of ripening.
“Onion harvest is best performed on a dry, sunny day.”
http://www.gardeningknowhow.com/edible/vegetables/onion/folding-down-onion-tops.htm