Composting Basics for Southern California Gardeners

Composting turns kitchen scraps and yard trimmings into rich, free soil amendment — exactly what Inland Empire clay needs. It also keeps green waste out of the landfill. With a few adjustments for our dry heat, composting here is easy. Here is how to start.

The simple recipe

Good compost balances two ingredients:

• Greens (nitrogen): grass clippings, vegetable scraps, coffee grounds, fresh plant trimmings.
• Browns (carbon): dry leaves, shredded cardboard, straw, small wood chips.

Aim for roughly two to three parts browns to one part greens. Too many greens turns slimy and smells; too many browns breaks down slowly.

Adjust for SoCal's dry climate

The biggest challenge here is not cold — it is dryness. A compost pile needs to stay as moist as a wrung-out sponge to break down. In summer heat, water the pile when you turn it and keep it in partial shade so it does not dry out. Turning every week or two adds oxygen and speeds decomposition.

What to leave out

Skip meat, dairy, oils, pet waste, and diseased plants — they attract pests or spread problems. Avoid weeds that have gone to seed unless your pile gets hot enough to kill them.

Using your finished compost

In two to six months you will have dark, crumbly compost that smells like earth. Work it into beds, top-dress the lawn, or use it as mulch. Mixed into clay soil, it dramatically improves drainage and feeds soil life.

Frequently asked questions

Does compost smell bad?

A balanced pile smells earthy, not foul. Odor usually means too many greens or too much moisture — add browns and turn it.

Can I compost in a small yard?

Yes — a compact tumbler or a worm bin works well in small SoCal yards and even on patios.

Arbol Roble has cared for Inland Empire landscapes since 1997, serving Rancho Cucamonga, Ontario, Fontana, Eastvale, Corona and Riverside. Request a free quote or browse our residential and commercial services.