There is a lot of conjecture out there about what is a mulch and how thick should it be? And a whole range of other questions that I will endeavour to answer or set straight in this article. This is of course in my opinion and based on my own experience of over 40 years of growing my own food and fruit on urban blocks of land. Pebbles/Stones : Not mulch heats up during day and radiates warmth into soil sending composting insects deep. Lucerne : Not mulch too open and is full of nitrogen and really is meant as a green manure so good in the compost or turned into the ground. Pea Straw : Not mulch to open just like Lucerne makes a great green manure. Let’s look at what are mulches? Bark/Wood Chips : Great for native gardens, but not so good for edibles. It can leech Nitrogen out of the soil and deposit sap’s and resins which aren’t good for edibles. Sugarcane : This is an adequate mulch for edibles it takes about 12 months to break down. Bamboo Mulch : Like sugar cane also good for edible
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