Leaving the stalks will help your bulbs rejuvenate for the following spring. The leaves act like solar panels, drawing energy right to the bulb and fattening them up. This is one way to keep the garden neat and visually appealing while your bulbs rest up.
When the flowers on the bulbs are done remove dead heads only and allow foliage to die back naturally. It's important to not damage the stalks by taking the whole bunch and tying them in a knot. Gently bend the leaves back and use one stalk to tie them all together.
only the stalk with the dead flower has been neatly cut back
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