I hope this is where I should ask this question. There is moss growing on the roof of the storage building next to our cabin and all around the outside of that building I have planted flowers, perennials, LOTS! One year my landlady sprayed bleach on the roof to kill the moss and where she did that the runoff killed everything making the ground sterile for 2 years. The moss is back. What can we use to kill it but not harm the plants when it runs off with the rain.

thank you for helping,

Kathy