Allium Care - to deadhead?
I've been delighted to grow allium for the first time this year, and I've got a wonderful display of 'Purple Sensation' and some interspersed 'Mount Everest' among the perennials and the roses.
However, some of them are starting to 'go off' a bit - the flower colour fading, and the petals being lost. I can't quite figure out what happens next: I've read lots of advice that says "leave them, and admire the seed heads", and just as much that says 'dead head them' and almost treat them like tulips - leave the leaf structure to give energy back to the bulbs.
What do people do with their alliums, and why?