how to makehow to make

compostcompost

Making your own compost isn’t as mysterious as many new gardeners might think.

It’s the natural decomposition of organic matters that revert back to their original state and provide a great basis for much of our gardening.

Start with 3 wooden pallets up-ended and tied together or staked.

Make sure the ground is clean and free from debris.

Step 1

There are two basic material requirements with compost: Carbon and Nitrogen

Carbon gives the volume while Nitrogen provides the fuel.

The ratio of carbon:nitrogen is 4:1.

Collect all your carbon sources. If you don’t have much then try and source some from other areas around your community.

Step 2

Sources of Carbon

Cardboard

Hay & Pea Straw

Dead Prunings

Corn Stalks

Newspaper

Pine Needles

Shredded Paper

Sawdust

Leaves

Dryer Lint

Old Potting Mix

If you need more carbon try sourcing shredded paper from offices, hay from a rural supplies outlet or directly from a farm and pine needles from a plantation.

You could even approach a local mill for bags of sawdust.

Nitrogen will fire your compost up and help generate some microbial activity to keep the heap ticking along.

Collect all your nitrogen sources. If you don’t have much then try and source some from other areas around your community.

Step 3

Sources of Nitrogen

Seaweed

Manures

Coffee Grounds

Vegetable Scraps

Lawn Clippings

Hair

Weeds

If you need more nitrogen you could ask your local restaurant if you can keep a bucket in their kitchen for vegetable scraps.

Or, approach a café for some of their coffee grounds.

Or, talk to a lawn mowing contractor about keeping some their clippings.

What else can go in the heap?

Wood ashes

Egg Shells

Onion Skins

Vacuum Dust

There are many other materials that can go into a compost heap but have little or no benefit apart from being recycled

Here they are…

What can’t go in the heap?

Dog or Human Poo

Meat (Cooked or Raw)

Bones

Oils and grease

Dairy Products

There are also many materials that can’t go in the compost heap because they either attract vermin or they harm the other materials.

Starting a compost pile is all about layers.

A layer of carbon followed by a layer of nitrogen. Top it with another layer of carbon and so on…

Use your largest materials on the bottom of your heap. This is good for two reasons; (1) It helps keep air moving through the heap, and (2) there is more chance for them to breakdown on the bottom than at the top.

Step 4

Some gardeners recommend that you mix materials prior to setting up the compost.

My advice is that it doesn’t matter if you plan to turn the heap at least every week.

Keep layering the materials with mobs of bulk (carbon) and then added fuel (nitrogen).

Keep a hose on hand to water the heap as it grows. After each addition of nitrogen water that layer in really well.

Step 5

The final heap will look quite busty but it will drop down as the decomposition begins to start.

Leave the heap in this state for two (2) weeks without turning. Keep it moist.

Top the heap off with a good smothering of fresh lawn clippings and water again – just in case.

I place a piece of PVC pipe in the middle of the heap to help keep some airflow through the pile.

Step 6

Two weeks later…

As you can see, I’ve been adding food scraps on top of the heap over this time.

Now it’s time to do the first turn and it will give you some idea of how it’s going.

Step 7

There a two ways to turn a compost pile. If you have space then run with 2 or more bins forking the contents from one to another.

If space is at a premium you can do it with one bin using this tool. Click the video to start it…

Sourced from Clean Air Gardening

You should notice when turning your heap, that some of the materials are quite warm and are covered in a white powdery substance. This is good…

Once it’s turned, you can leave it for up to a week before turning again. However, the more you turn the compost heap the quicker the materials will decompose.

Step 8

After 4-6 weeks of continual turning your compost should be at a point where it’s ready to use.

When all the materials are no longer recognisable and the heap looks more like organic soil. The heap should no longer be hot but it may still be a little warm.

How do you know when it’s finished?

Once you have this great organic compost, what can you do with it?

Don’t use compost directly as potting or seed raising mix. You will need to add some other ingredients so that plants get the best start. There’s a recipe on the next slide…

Caution…

• Make your own potting & seed-raising mixes

• Mulch garden beds

• Use it as a soil improver

• Turn it into a compost tea liquid fertiliser

Compost Uses

Neville Sweeney from selfsufficientish.com has a great article and recipes on how to make these…

Recipes

Your own compost

Peat moss or coir fibre

Sand

Vermiculite or Perlite

Making your own potting mixes

Ingredients

Click here.