Why Start Composting?
Composting is one of the simplest and most impactful things you can do at home for the environment. Instead of sending food scraps and garden waste to landfill — where they produce methane, a potent greenhouse gas — you transform them into a rich, dark material called humus that supercharges your soil.
The best part? It costs almost nothing to get started, and nature does most of the work for you.
What You Need to Begin
- A compost bin or designated pile area — a simple heap in a corner of the garden works fine, or use a purchased bin for tidier spaces.
- A mix of "greens" and "browns" — more on this below.
- Moisture — your pile should feel like a wrung-out sponge.
- Oxygen — regular turning introduces air and speeds up the process.
Greens vs. Browns: Getting the Balance Right
The secret to a thriving compost pile is the carbon-to-nitrogen ratio. In practical terms, this means balancing two types of material:
| Greens (Nitrogen-rich) | Browns (Carbon-rich) |
|---|---|
| Vegetable and fruit scraps | Dry leaves |
| Coffee grounds and tea bags | Cardboard and paper |
| Fresh grass clippings | Straw and hay |
| Plant trimmings | Wood chips or sawdust |
| Eggshells | Paper egg cartons |
Aim for roughly 3 parts browns to 1 part greens by volume. Too many greens and your pile becomes slimy and smelly; too many browns and it dries out and barely decomposes.
What NOT to Compost
Some materials will cause problems — attracting pests, introducing pathogens, or simply not breaking down well:
- Meat, fish, and dairy products
- Cooked food with oils or sauces
- Dog or cat waste
- Diseased plants
- Glossy or colour-printed paper
- Coal ash (wood ash is fine in small amounts)
Step-by-Step: Building Your First Pile
- Choose a location. A shaded or semi-shaded spot with some contact with the bare ground is ideal — this allows worms and beneficial microbes to enter from below.
- Start with a brown base. Lay 10–15 cm of coarse browns (twigs, straw) at the bottom to allow airflow.
- Layer greens and browns. Add your kitchen scraps, then cover with a layer of dry leaves or cardboard. Repeat as you accumulate material.
- Keep it moist. If you live in a dry climate, water the pile occasionally. It should be damp, not waterlogged.
- Turn it regularly. Every 1–2 weeks, use a fork to mix the pile, bringing the outer material to the centre. This accelerates decomposition dramatically.
- Wait and observe. In warm conditions with good management, compost can be ready in 2–3 months. In cooler weather or with less turning, allow 6–12 months.
How Do You Know It's Ready?
Finished compost is dark brown or black, crumbly, and smells earthy — like a forest floor after rain. You should no longer be able to identify the original materials. If chunks remain, sieve them out and return them to the active pile.
Troubleshooting Common Problems
- Smells bad: Too many greens or too wet — add more browns and turn the pile.
- Not decomposing: Too dry or too many browns — add water and some nitrogen-rich greens.
- Pests attracted: Avoid adding cooked food; bury fresh scraps in the centre of the pile.
- Pile too cold: Add more nitrogen materials and turn more frequently to generate heat.
Composting is a forgiving practice — even imperfect compost piles eventually produce usable material. Start small, observe, and adjust as you go. Your garden, and the planet, will thank you.