I have a south facing garden, the border in question is in full sun from late morning till evening. Soil is clay and crap quality. We used to have large bushes with the worlds biggest thorns on. We dug them out and are now left with a handful of plants and lots of weeds. New plants struggle to establish, I’m scared to dig too much to add manure and compost as there are two decades worth of pet rabbits and guinea pigs buried.
My idea is to chop everything down, cover with weed membrane, gravel and add alpine rockery type plants along with a few artfully placed rocks.
It’s a big border though,18m long and 1m wide, so a lot of gravel to scrape up if I change my mind.