Can anyone help me identify it? It might be a ribbon or umbrella bush. It's got long grassy leaves that are v long now. It's our first spring in this house and I am a garden novice. The grassy bushes were cut right back over winter. Today I read something online and just lobbed all the ends offas the blades were super long and covering other shrubs. The garden looks terrible and I'm worried I've killed the bush.
I can only describe it as having growing long grassy leaves which grow up and out. It's lovely but when too long it flops down. It's v common as I've seen it in many other gardens and I'm embarrassed I don't know what it is and how to prune it!