Nick Kitchener, I totally love that thought process. That's exactly how I feel about every "problem" we encounter in our gardens.
But I also don't want to tick off all the neighbors and face possible consequences from the city or developer. It's a newer housing development, so it's a unilawn with some rock gardens. I'm working to set a good example so maybe some others will want to change that, too. And also, I'm planting comfrey in these beds and wonder if they will create lots of baby comfreys
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So right now, all I'm doing is pouring my urine mixed with water and a tiny bit of castor oil over the beds (they need some nitrogen added anyway since it's just carbon right now). I don't know if it will repel them or not; we shall see. We're next to quite a bit of undeveloped prairie area, so I'm thinking now that the snow cover is gone, most of them will head on over that way.