Cut allium foliage around mid-summer, when the leaves turn yellow and die back. Keeping the foliage on the allium after it has finished blooming for the season helps feed the bulb for the following year. Once the leaves expire, you can remove the foliage.
About this Author
Janet Teas has been writing professionally since 1993. She is an architectural color consultant, avid gardener and decorator. She has written home and garden articles for publications such as "Better Homes & Gardens," "Hometown Cooking," "Country Woman" and "The Essential Herbal" magazine. Teas received a Bachelor of Music in music education from Bowling Green State University.