I planted a Primrose plant two years age and didn't realize it was so aggressive. I have moved most of it. How can I kill the rest?
How to Remove Primrose Plants Taking Over in Garden
They are very evasive ground covers. I had the same problem. Here's what I did: Using spade - dig up as much of the root system as you can. Do this until all are removed. don't leave in to flower & seed or you will continue to have a problem. You just have to keep doing until all are done & gone. It's a task.