its hardy temperature wise. but it wont supress bracken I have ajuga around small native ferns and the ferns grow through it, so does arum macculatum. It forms a pretty carpet around shrbs though.

In my experience, nothing suppresses bracken - it even grows in dark corners under and through mature shrubs.

Thanks Seaburngirl, liked your answer, I did not explain requirements very well, will re-describe and resubmit

Thanks all for replies