Deadheading

Question

When deadheading a white or purple allium, should I only cut off the top “globe-shaped flower” and leave the long green stem OR should I cut the flower and stem all the way to the bottom of the stem?

Answer 1

You would cut the whole stem to the ground, but leave the foliage to nourish the bulb. They won't bloom again this year.

https://www.gardeningknowhow.com/ornamental/bulbs/allium/allium-post-bloom-care.htm