Cold weather, including frost, can cause onion plants to bolt, meaning to produce a tall stem and flower. Onion plants that bolt have smaller bulbs and do not store well.
Will Frost Hurt Onion Plants?
By Sandy Mitchell ; Updated September 21, 2017 Cold weather, including frost, can cause onion plants to bolt, meaning to produce a tall stem and flower. Onion plants that bolt have smaller bulbs and do not store well.
