be advisable to use a vermin-tight composting bin.

_Granite dust._ See _Rock dust._

_Grape wastes._ See _Apple pomace._

_Grass clippings._ Along with kitchen garbage, grass clippings are
the compostable material most available to the average homeowner.
Even if you (wisely) don't compost all of your clippings (see
sidebar), your foolish neighbors may bag theirs up for you to take
away. If you mulch with grass clippings, make sure the neighbors
aren't using "weed and feed" type fertilizers, or the clippings may
cause the plants that are mulched to die. Traces of the those types
of broadleaf herbicides allowed in "weed and feed" fertilizers, are
thoroughly decomposed in the composting process.

It is not necessary to return every bit of organic matter to
maintain a healthy lawn. Perhaps one-third to one-half the annual
biomass production may be taken away and used for composting without
seriously depleting the lawn's vigor--especially if one application
of a quality fertilizer is given to the lawn each year. Probably the
best time of year to remove clippings is during the spring while the
grass is growing most rapidly. Once a clover/grass mix is
established it is less necessary to use nitrogen fertilizers. In
fact, high levels of soil nitrates reduces the clover's ability to
fix atmospheric nitrogen. However, additions of other mineral
nutrients like phosphorus, potassium, and especially calcium may
still be necessary.

Lawn health is similar to garden health. Both depend on the presence