From Plant Waste to Plant Loving Compost in as Little as Four Weeks

Here's the third instalment of wisdom from compost expert Andy Davenport who's also available to answer your compost questions - just post them in comments and he'll respond!

Spring is probably the best time of year for making compost. After the long winter rest, nature begins to wake up; the sap starts to rise, bulbs throw up their shoots, seeds germinate everywhere and life returns to the garden. The fresh leafy spring growth is full of the vitality, energy and nutrients that plants have been slowly storing up over winter and is especially good at kick starting the compost heap. The first batches of weeds and grass clippings are full of life and vigour and contain high amounts of simple sugars and nutrients which are the perfect food for the bacteria in the compost heap. They soon get to work quickly breaking it down and their frenetic feeding, breathing and rapid reproduction soon gets the temperature up in the compost heap.

Compost heaps that were built last autumn will have come to a standstill over winter. These can be re-energised and finished off by taking the compost heap down to about half its height and rebuilding the top half of the heap, alternating layers of fresh green materials, such as grass clippings and weeds, with the old compost. It is very important that these materials are fresh otherwise they won’t raise the heat and will have little impact. Nettles are particularly good because they are full of iron and other minerals - they also make an excellent activator and can generate high temperatures in the heap. The layers should be no more than 4” (10cm) deep and should be built by placing handfuls of material working from the outside towards the centre of the heap. Sprinkle QR activator on the heap prior to the addition of each layer and remember to place some hessian sacking or old carpet on top of the rebuilt heap to retain the precious heat. If the bin isn’t fitted with a lid, place some rainproof sheeting over the heap to keep out the rain. A heap rebuilt in this way will make excellent compost in about 4 to 6 weeks.

Alternate layers of fresh green materials, such as grass clippings and weeds, with the old compost









All those dry winter stems and clearings from the borders can be used to build a new heap but they need some preparation first. They need to be shredded or broken up into small pieces which can easily be done by chopping them with a spade in one of those floppy plastic buckets. If they are dry then give them a good soaking overnight. Rainwater with some soil added, urine or rain water mixed with some well rotted manure are all good for the job and will also add valuable minerals, nutrients and enzymes to the heap which will assist in the breakdown of tough materials . After soaking, leave them to drain off for a couple of hours so that they are not too wet. They can then be used to build into layers of the heap alternated with layers of fresh greens. Add the QR activator, heat retention and shelter as explained earlier. A heap built like this in the spring can make great compost in about 6 to 8 weeks. As the seasons progress the vitality and nutrients in the plant materials gradually reduces and so the time to ripen slowly increases, despite warmer summer temperatures. The summer compost heap usually takes about 8 to 12 weeks to reach maturity and an autumn heap about 12 to 16 weeks. However these timings are still very fast compared to other methods - it is no wonder that Miss Bruce called her system the ‘Quick Return’ method.

Labels: allotment-compost, quick-return-compost