Invasive Ferns -- How do I kill them?
I generally love ferns. However, we recently bought a house with a 25 x 4 foot area covered in what I believe to be ostrich ferns. Whatever they are, they are incredibly invasive and spread quickly. They've spread into the adjacent grass, perennial bed, etc. I want to covert the "fern bed" to a flowering perennial bed and and looking for a way to kill the ferns for good. I've had no luck in pulling them and am wondering if anyone has had luck using Round-up each time a new plant emerges. I've tried to stay away from chemicals but it looks like I may need to use them. Any ideas would be helpful.