Any advice will be appreciated

For many years, this was just a plain old myrtle patch, which was fine by me because it was pretty and very low maitenance.   As you can see, I now have ferns growing here.

I have tried pulling them out but they always come back stronger than ever.   One friend of mine has suggested Round-up, but I don’t like using weed killer, and I think that will damage the myrtle.

I would love to pick a spot and transplant a few beacuse they really are pretty, but I don’t want them growing in this particular spot.   So, if anyone reading this has any advice, I would love to hear from you!