I nearly lost one of my newly planted Goodbye Pork Pie Hat last year to what looked (and smelled) like crown/root rot. The soil in my garden varies and this plant ended up in an area with white clay veins. I've since read that this type of clay is low in oxygen? Dug it up, replanted up hill in the dry zone, and it recovered and bloomed this year. The only seedling I lost this year I stupidly planted in the exact same place. Seedlings 12 inches on either side are doing just fine. That has been my only experience with crown/root rot so far. Been watering a half inch every three/four days for about six weeks d/t no rain.
