I think I am right that the old way of dealing with these was to set fire to it! That is bad for the environment so I guess you can cut it right back. Happy to be corrected if I am wrong.
Cut out / pull the collapsed old flower stems , I've raked them in the past and cleared out the crown ( centre ) of the dead material . You don't cut any green grass.
If it were mine, I'd probably decapitate the entire thing as low as possible with some electric hedge trimmers and then get OH to dig it all up so I could plant something attractive.
However, if you like it I would suggest you remove all the spent flower stalks as low as possible, rake the remaining foliage to remove loose and dead foliage and then stand back and consider. If you do cut back some of the remaining green foliage make sure you do it at the base of the stem rather than giving it a crew cut/Bart Simpson chop as the ends of those leaves will go brown and unsightly.
Once you've done all that, consider digging a bed all round in which you could plat more interesting foliage - shrubs and perennials - so it looks less like a sore thumb sticking up.
Vendée - 20kms from Atlantic coast. "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
My next door neighbour took a powered hedgecutter to his. Ironically it ended up looking like a large hedgehog in the middle of the lawn. If they are up to "that sort of thing", we haven't been invited 😳
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
However, if you like it I would suggest you remove all the spent flower stalks as low as possible, rake the remaining foliage to remove loose and dead foliage and then stand back and consider. If you do cut back some of the remaining green foliage make sure you do it at the base of the stem rather than giving it a crew cut/Bart Simpson chop as the ends of those leaves will go brown and unsightly.
Once you've done all that, consider digging a bed all round in which you could plat more interesting foliage - shrubs and perennials - so it looks less like a sore thumb sticking up.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
If they are up to "that sort of thing", we haven't been invited 😳