|I have an odd new growth of mushroms coming up in differing areas of my yard. I have them in the lawn and in barked areas where I would anticipate the soil would be more acidic. I fertilize and care for my lawn both in the spring and fall, and my barked landscaped areas I keep clean and weed free with Preen which I apply twice a year. The yard seems to get a different crop of these things each fall. Last year they were multi layer and bright orange, this year they are either tall and snow white, or they are brownish grey and short with small flat heads. I would like to know what caues them, and what the commnon denominator is that causes them to come up in differing soils! Thnaks ahead of time!