LRB,
Banana plants do best in temps 70-90 degrees, that's the caveat with my post with keeping the soil damp. With cold damp conditions constant damp soil conditions are not a good thing, but we are talking about growing plants in ideal conditions not the less than ideal. I am out of the nursery business but regardless, I think I know what I am talking about. Personally I have never had a problem with burn on my mature banana plants no matter how much fertilizer I put on them. On mature plants you can plop down as much chicken, horse, cow, or whatever manure on them without any worry. I have even taken entire concentrated 1/2 pound green packs of miracle grow and put them around some banana plants with very good results. But again this is for mature plants not for small starts or the like.
