I just bought 4 bags of Whitney Farm's "Uncle Malcolm's Weed Whoppin' Mulch" which includes corn gluten as one of its ingredients. My plan is to use this mulch on a rose & perennial bed that we began planting last fall. Currently, the bed contains roses and Blue and Rose Queen Salvia. I am about to plant clematis, hardy geraniums and some daffodils that didn't get planted last fall as well as some pansies, for instant color, in the bed before I mulch. My question is: does corn gluten present a problem for perennials and bulbs that died back to the ground in the winter? In other words, will it inhibit/kill the new growth next spring or restrict the spread of new growth for the more mat like hardy geraniums? Terry