I have it lining the front of my main rose bed. It hasn't gotten under the roses just yet, but I don't think it will be a problem. If it does, it's fairly east to dig it up (and move it somewhere else as it's a very good ground cover). It does spread horizontally under ground, so if you like having bare earth directly under your roses (for putting in fertilizer and such) you may want to keep it from growing directly under the roses. The main problem I have with my mondo bed is that it's been invaded by my bermuda grass (from underneath a 2 ft wide walkway, can you imagine!) and I have to keep pulling out the bermuda and other weeds. I'm hoping that the mondo gets so dense that it will crowd out the others. When I was at Biltmore, their rose garden had what I think was fescue at the front border of the rose beds. It appeared that they edged the fescue to keep it out from under the roses. I can't do that in my bed because of the mulch. But again, I hoping that the mondo will get so dense that I can forgo the mulch at some point in the future.

More than likely they yellowed because of lack of water, since foot traffic can disturbe soil structure. Do not aerate. A general fertilizer from Wal Mart will be fine. No need to cut back. I have raised it for years and unlike liriope it does need trimming back. Throw some manure or compost around so when spring rains come it should wash through. Here is a link that might be useful: Propagating Perennials.

You're doing the right things for it. It's just slow. This will be a huge advantage once it is established since you won't have to fight to keep it where you want it. I'd hand weed it. Weed and Feed is for turf grass which is an entirely different plant.

hello mrcarron64... you're tailing on someone else's post so I'm not sure this will reach you. I would expect after 10 years, the patch may just exhaust itself much as a lawn might do.... parts get choked with roots, there may be pockets that miss nutrition or water because of that. Or of course the occasional disease, root-eating grubs etc. If you are unfenced, consider the occasional dog visiting and urinating. Bit late in the season but perhaps you should talk to the nursery people about whether a restart of the area would freshen it up, dig up, divide, save healthy plants, freshen the soil and start over? Just a thought. If that's a bit too drastic, I'd think of doing a test for grubs... leave a wet bag on an area adjacent to the dead patch over night and lift early morning and see if anything has risen to the surface after a night of chomping roots. Or, just dig out the affected sections, salvage what you can or buy new plants and separate and plug the gaps and wait for re-growth to fill.