I have used Wet and Forget on a low roof where I used a stepladder with a pump sprayer and also found that it would reach the top of the roof while standing on the ground. I understand that zinc strips applied at the ridge will eliminate the problem and may be a viable method as it will last years. I had not heard of the ferrous sulfate for yard moss and will have to try that. How is it applied.
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I am a retired workaholic and continuing aquaholic
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