I have a medium yard, the homes are 60-80 years of age so the soil lacks lots of nutrients. I have many trees with beds surrounding them and more beds all over. My plants are growing, lots of perinnals but they lack food from the soil. There is also a lot of roots so I can't dig very deep or wide. I've been told by neighbors who have beautiful yards and they say to use compost but then I read warnings about compost burning. I want to place it around my existing plants, not work it into the soil. Peat humus compost won't burn but doesn't brag about nutrients. Help!! I'm totally confused. Thank you, by the way.