In my main, most favorite, and proudly deer-proof perennial border at my house in Germantown, NY, I have a grass that eaten its way into about 1/2 of the (5’X25′) bed. I believe the grass is miscanthus s. ‘purpurascens’, it is an early bloomer, just about to bloom now. It is a runner that has taken over despite my trying to pull it up (seems that may have even made it worse). It is a border of about 75% ornamental grasses – miscanthus ‘floridulus’, panicums, chasmanthiums, etc. But this grass has grown through baptisias, amsonias, monarda, peonies, everything. It even growns into the lawn, but we keep it in check there.
I have never used anything that wasn’t organic in this garden. I have a 10 month old baby and don’t have the time to attack it again unless with chemicals (or a bulldozer). I would welcome any advice on how to deal with this.