I like Golden Rod, lovely for cut flowers. I can't seem to grow it in my garden, the slugs get it before it has a chance to grow to any size. They'll be digging the grass up next, isn't grass pollen a big problem?
I am sure we never used to have so many allergy sufferers. Having said that my husband gets hay fever and I have recently started with it, we wouldn't ask for someone's plants to be dug up though.