Elaine, Black Kow is only 0.5-0.5-0.5. It is well composted. I use it with all my garden soil amendments and as a 1/3 part of all my potting mixes. I go though 10-15 bags every single year. I have never, ever had a plant "burned", regardless of the rain amount. Needless to say, we get the same torrential rains as you do when thunderstorms move through.
