Some gardeners like to add compost activators, too.

Nettles themselves contain a lot of nitrogen and so are used as a compost activator or can be used to make a liquid fertiliser which although somewhat low in phosphate is useful in supplying magnesium, sulphur and iron.Pears, Pauline, et al. HDRA Encyclopedia Of Organic Gardening, pp207, Dorling Kindersley Ltd, London, 2005.

While many of the merchants advocate a need for compost activators to speed up the process, several recent studies have shown that the products are not entirely necessary.

Comfrey as a compost activator - include comfrey in the compost heap to add nitrogen and help to heat the heap.

They are built up in tiers of well-rotted manure, grass clipping and annual weeds from the garden; thin layers of pigeon droppings are then used as a compost activator.

Nettles contain a lot of nitrogen and so are used as a compost activator or can be used to make a liquid fertiliser which although somewhat low in phosphate is useful in supplying magnesium, sulphur and iron.

Opt for the Value Bundle, which includes the bin, compost activator and a pitchfork for turning (0800 032 0377; www.recycleworks.co.uk).

The nuns engage in various handicrafts, run the abbey shop and have built a compost activator.

If after all this sandwiching, the pile just sits there, it can be turned, and as it is turned, compost activator can be added.