What Can Be Used in Mulching Compost

All spent plant growth from the garden. Leaves can be stripped from the prunings and used. Heavy prunings should be shredded.

  • Avoid using bulbous weeds including oxalis, onion weed and nut grass, as enough of these will either escape or survive the heat to cause weed problems in the mulching compost. Couch or kikuyu runners and Wandering Jew invariably survive unless they happen to be in the hottest centre of the heap, so it is as well to spread these in the hot sun for a few days before using them.
     

  • Grass clipping are valuable, especially when used as suggested earlier. Use all vegetable and fruit peeling in the mulching compost but meat or processed food should be avoided. Egg shells are good particularly if crushed. Newspaper or cardboard can be used, providing it is shredded and moistened. Mix it as much as possible with other ingredients so that it does not predominate in areas. Objections about lead in newsprint are unfounded, especially in these days of cheaper synthetics.
     

  • Gum leaves and most other leaves are excellent, providing they are moistened before being added and are confined to thin layers, or mixed in with grass clippings or other material. I hesitate to use large amounts of camphor laurel or she-oak (casuarina) leaves because they seem to contain substances that at least inhibit seed germination. However, these can still be useful as surface mulches in other parts of the garden.

Remember that it is hard to make really bad mulching compost but some brews are better than others.
 

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