Hi Sven,

Do you know what can and what can't go in compost and what makes the best compost? I am about to start a compost heap in our new garden. Is it true that if I spread it on my flower beds it will feed the plants?

Mike

Our Gardens Expert replies:

Hi Mike,

Adding compost to the garden is one of the best ways of improving the soil and therefore plant growth and productivity. Compost greatly increases the nutrient levels in the soil as well as improving soil structure, drainage, and also encouraging useful micro-organisms. Not forgetting the fact that it is also a great way of recycling waste that would normally end up in a landfill site, so you are doing your bit for the environment too.

When you create a compost heap you are aiming to speed up the rotting process of material that was once living. Most ex-living material will eventually break down into compost, but for best results be selective about what you put on the heap. Compost heaps rely on heat created in the pile and micro-organisms to break down the matter and turn it into compost, good air flow is essential and regular mixing of the heap also speed up the process. Ideally a compost heap should be at least a cubic meter in size, large enough to generate adequate heat for decomposition.

What to put in

Most raw vegetable matter is ideal for composting, so collect all kitchen waste and chuck it in. Cooked vegetables and meat are not ideal because they attract unwanted vermin.

Grass clippings can be added and are great source of nitrogen but be sure to mix them in well because too much can turn into sludge and inhibit air low.