“[I] have a question regarding my chives. They have flowered. Should I cut them back now this time of year or leave them be?” Question from Jeanne of Coldwater, Michigan
Answer: The foliage of edible chives (Allium schoenoprasum) will remain attractive and clippable until the first frost causes the strappy leaves to flop. You can cut them back at this time if you wish. Otherwise, leave them up to enjoy through fall. The same goes for summer-flowering ornamental onions.
Black Gold Horticulturist