Two questions for the nature experts: Q1. What type of spiky coastal grass is this? I have a clump of it in my garden, about 1 metre tall, and I usually see it among sand dunes. I'm pretty certain it's not Marram, but can't for the life of me find its name online. Q2. Why is it so popular with wasps? They're all over it from dawn 'til dusk but don't appear to be hunting any bugs, so what's the appeal? Thanks in advance.