Leaves/Grass/Pruning Mixture

It would be an ideal situation if all of the yard trimmings produced could simply be mixed together and composted. However, since woody materials, such as prunings, decompose so slowly this may not advisable. Woody materials in the compost pile can also cause problems with the turning. 

Another alternative in certain situations, is to grind the woody wastes to mix with the grass and leaves. Woody materials should make up no more than one-third of the pile. Remaining ground woody materials should be kept separate to be used as a mulch, while the leaf/grass mix is used as a compost.