We have a holly tree in one of our borders. It is a decent size (about 4ft at wide & 9ft tall). The canopy is about 3.5ft up. Under it is earth. I have tried planting under it with limited success (bulbs, lily of the valley, ferns...the only thing to have slightly flourished are the hellebores). I spent about two hours this afternoon, as I have to every month or so, raking up all the dead leaves, putting them in the bin & weeding under it. For now, it looks quite nice but, within days, will look messy again. I don't know what to do with it. If I put bark down, it would be impossible to rake up the leaves. Likewise gravel (which would also look out of place). Would turf take if it put it down? That way I could just mow the leaves along with the grass. Any other ideas?