What Is Compost?
Noun – Compost is described as a rich, crumbly, soil-like material used for gardening
Verb – Composting is the breaking down of plant material that is no longer living, with the help of micro-organisms through a decomposition process
Understanding a few basic composting principles will help you get the best results.
If you want to produce compost that looks good enough to eat just think – Mmmmm!
- Add as many different plant based ingredients as you can find
- Alternating layers of leaves, grey matter, and soil
- Different materials provide different nutrients. For example: grass blades provide nitrogen, dried leaves in the fall provide phosphorous
- The more bulk you have (up to a certain point) the faster it will decompose
- If everything is chopped too finely there will be no air circulation, causing unfavourable conditions. You do not want to have many pieces over 1/4″ diameter
- Even though you do want to have some bulk, large, thick pieces will decompose very slowly
- For example – the stems of tomato plants would take a long time to decompose as is, but if you were to cut or shred it into small pieces – It would decompose much quicker
- In the fall – shred leaves with the lawn mover before adding it to the pile
- In order for proper decomposition to occur it is necessary for the pile to be moist and not too dry or too wet
- Keep turning your pile towards the centre of the pile where all the action is taking place
- The centre of the pile will heat up to about 150 degrees Fahrenheit or 65 degrees Celsius
- If you turned your compost pile every day, it would be ready to use in 2 weeks
- If you turned your compost pile once a week, it would be ready in 3 months
- If you turned your compost pile once a month, it would be ready in 1 year
If you have followed these principles, the results will be the most amazing material you could hope for to use in your garden. Compost is often referred to as “black gold”.
What Can Be Composted?
Anything of living plant origin can be composted, but the quality and quantity of the materials you use affects the process and determines the nutrient value of the finished compost. Here is a chart of what can and cannot be used:
|Can Be Used
Each Item should be under 20% of the total pile
|Caution – Limited Amounts
Each Item should be under 10% of the total pile
|Do Not Use
Leaves (Shred if large or waxy)
Grass Clippings (Dried first)
Reject or Soiled Produce
Fruit & Veg. Peels
Stable or Poultry Manure
Weeds that have gone to seed
Meat & Bones
Seed & Fruit Pits
Cat & Dog Manure
As mentioned in our definition of composting, decomposition only occurs with the presence of micro-organisms. Micro-organisms are small microscopic creatures that are naturally present in soil. Like most things, there are good micro-organisms and bad micro-organisms. The success of your compost pile depends upon which micro-organisms you have present. The good micro-organisms are called “aerobic” and the bad ones are called “anaerobic”.
Good composting organisms need 4 things in order to survive:
- A balanced diet – not all the same material
That is why it is important to have a compost pile made of different materials that has some bulk to them and that is kept moist. When these conditions are met, the pile will naturally heat up in the centre and that is where organisms will be the most active. When only anaerobic organisms are present, that is when you have a bad odour.
Tips For Successful Composting
|Good Compost Pile: Aerobic||Bad Compost Pile: Anaerobic|
|Ingredients:||Made from once-growing plant material||Animal Parts
Man-made synthetic parts
|Necessary Size:||Between 3’x3’x3’ to 4’x4’x4’||Under 3’x3’x3’ or over 4’x4’x4’|
|Moisture:||Evenly Moist||Too dry or too wet|
|Mixing:||As often as you can||Never|
|Other Characteristics:||Presence of earthworms
Medium sized pieces
Heats up in the middle of the pile
Contains many nutrients needed for proper plant growth
Bad rotting odour
Very slow to decompose
Too fine or too large of pieces
Does not heat up
Does not have many nutrients
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