Compost? It's easy ! It is sufficient to store organic waste in heaps which, under the effect of fermentation, decompose little by little. For the garden, compost nourishes the soil and it is good for the planet. What waste to compost? Thanks to compost, you will be able to reduce the weight of your household trash by more than a third. Kitchen waste, such as peelings, eggshells, coffee grounds, paper filters, bread, dairy products, cheese crusts, vegetable tops, damaged fruits and vegetables are compostable. Ditto for household waste, including tissues, wood ash, sawdust and shavings, newsprint, cardboard, indoor plants. On the garden side, all green waste will be affected: mowed grass, leaves, wilted flowers, weeds ... Basically, it is all organic waste of everyday life. To avoid unpleasant odors, it is advisable not to put leftover meats in the compost. And beware, some waste is to be banished such as plastic, synthetic fabrics, glass, metals. Should we choose a heap or bin compost? First, find a convenient place to install your compost. "You can put it anywhere, since there is no smell," says Jean-Paul Collaert, master composter in the Bordeaux region. You then have the option of choosing several methods and materials for making your compost. - Compost in a heap: the technique consists in gathering the waste directly on the ground in order to form a heap with a height of 50cm to 1m50 on average. The advantage: you can play on the height and the length, there is no volume constraint. Jean-Paul Collaert warns about this type of compost: "most people do this, but the result is not always a success. It is easier to start with composters in the bin." - Compost in a container: in wood, metal or plastic, it is recommended to choose a container of 300 to 700 liters. Avoid models with hatch, because this system gets stuck after a while and is of no use. You will find composters from € 30, sold in garden centers, hardware stores and supermarkets. If you are a do-it-yourselfer, you can make your own composter with boards and mesh or concrete blocks. Please note, local authorities, as part of operations to promote individual composting, provide you with free equipment. Check with your town hall. How to install a composter? Make sure to install the composter on the ground, to facilitate colonization by earthworms and insects. The transformation of organic matter will take place naturally. For good compost, care must be taken to mix the different categories of waste well, aerate the materials and monitor the humidity. In addition, it is essential to vary the waste and mix it. The best is to proceed in successive layers, alternating dry and wet waste. Mix each new layer with the one below, without ever packing because the air must circulate. Protect the compost from the rain, and conversely, moisten it if the weather is too dry. Vermicomposting For city dwellers, vermicomposting is a very practical solution, because the bin can remain inside the house. As the name suggests, earthworms are introduced into the compost to speed up the process of decomposing organic matter. A compartment system allows the compost to be recovered after 2 or 3 months without losing the worms. It is a fun solution for children and odorless. You will find them in garden centers around 100 €.