Sheri I buy Mushroom compost at homedepot a bag of 40 lbs for around 8$ I mix it in with my own compost or soil I use when I plant in the yard,, My plants seem to love it,, I top dressed my brugs with it this last
spring. I will do it again next
spring.
I agree with Spearo,, in that top soil varies, alot of it has clay in it. I only use top soil to fill in holes the rain has washed out,, and I always look for a 'ripped' bag at the stores to make sure no clay is in it or rocks,
If you want compost or mushroom compost homedepot carries it in most states, it's moist, and rich,, looks a lot like home compost< rich and darkand smells 'earthy'