Compost Troubleshooting: 7 Common Mistakes (+ How to Fix Them)

There’s something incredibly satisfying about turning kitchen scraps and garden waste into rich, dark compost. It’s one of the simplest ways to replenish your garden’s nutrients while reducing waste at home. But composting isn’t always straightforward — especially when you’re just starting out. Maybe your pile smells… off. Or it’s too dry. Or just not breaking down at all. I’m a completely new beginner to composting, and don’t claim to be any sort of expert on this subject. BUT I thought it would be really helpful to compile some tips I’ve learned along the way and pass them along.

Recently, I spoke about how to start a compost pile. So if you haven’t check that out yet, check it out. I tell you exactly how to get it going, list what to put in the pile and what NOT to put in the pile, along with graphics and checklist.

In this post, we’ll walk through common composting mistakes and what you can do to fix them — so your compost can actually help your garden thrive.

This post is all about composting and gardening.

Table of Contents

Your Pile Smells Like Rotten Eggs

A healthy compost pile should smell earthy — like the forest floor after rain. If it smells sour, swampy, or like rotten eggs, that’s usually a sign your compost is too wet or lacking oxygen. These anaerobic conditions encourage the wrong kinds of bacteria and slow everything down. That’s not what we want to happen. We want everything to compost as quickly as possible so we can use it in the garden.

Here’s the remedy:
Add more carbon-rich browns like shredded leaves, straw, or torn cardboard. Turn the pile well to introduce air and help moisture escape. Going forward, avoid adding too many wet kitchen scraps without balancing them with dry material. I would even create a cover for the compost pile this way it doesn’t become too wet when it rains. Instead you can water the compost pile and add as much water as it needs.

It’s Too Dry and Not Breaking Down

If your compost pile is dusty or brittle, or it’s been sitting there unchanged for weeks, it probably needs more moisture. Decomposition relies on active microbes, and they need water to work. If you grab a handful of the compost and squeeze it, but there’s no moisture, it’s too dry. On the flip side, if you grab a handful of compost, squeeze it and liquid comes out, it’s too wet. The compost should

Here’s the remedy:
Water your compost like you would a houseplant — aim for the feel of a wrung-out sponge. You can also add moist greens like veggie peels, apple cores, or coffee grounds. Just don’t flood it; too much water is another problem (see above).

You’re Not Turning It (or Turning Too Often)

Turning compost helps introduce oxygen and keep decomposition on track, but too much movement can also disrupt the microbial magic. It can start to smell, which means something is off with the pile. In addition, materials in the pile may be broken down unevenly.

Here’s the remedy:
Aim to turn your pile every 1–2 weeks. That’s enough to mix ingredients and speed things up without disturbing the process. If you’re using a compost tumbler, a few turns every few days is perfect.

You’re Adding the Wrong Things

It’s tempting to toss all your scraps into the bin, but some things just don’t belong in backyard compost — they attract pests or cause imbalances. You shouldn’t be adding in items like meat, dairy, bones, greasy or oily foods, pet waste, diseased plants, glossy or colored paper, or any weeds that have gone to seed.

Here’s why.

Waste like meat, dairy, bones, and greasy or oily foods will do nothing except attract animals. You probably don’t want to wake up finding raccoons digging around in your compost pile. Pet waste can add pathogens and parasites to the compost. Composting won’t remove any of the hazards that may be in the feces. Diseased plants can carry pathogens like bacteria, fungus, and viruses. The compost pile won’t get hot enough to get rid of these pathogens. Some pathogens won’t allow you to grow in the area that they infect and that can last for years! Glossy and colored paper have chemicals used in them that shouldn’t be in the garden. Any weeds that have gone to seed can potentially take over your garden!

Here’s the remedy:
Stick to fruit and veggie scraps, coffee grounds, eggshells, paper, leaves, and yard clippings. Avoid meat, dairy, fats, pet waste, glossy paper, and diseased plants. Not sure what’s safe? Print a compost “yes and no” list to hang on the fridge or near your bin.

Your Ratio Is Off: Too Many Greens or Browns

Composting is a balance of greens (nitrogen-rich like kitchen scraps) and browns (carbon-rich like dry leaves). Too many greens can make your pile wet and smelly, while too many browns can slow things to a crawl.

Here’s the remedy:
Aim for roughly 3 parts browns to 1 part greens. If in doubt, add more browns — they’re usually the missing piece in smelly or stalled piles.

The Pieces Are Too Big

Throwing whole corncobs or branches into your pile will take ages to break down. Large items slow everything down and make it hard for microbes to do their job efficiently.

Here’s the remedy:
Chop, shred, or chip (using a little wood chipper) materials before adding them. Break down branches, tear up cardboard, and slice large veggie scraps. The smaller the pieces, the faster they’ll turn into compost. I personally like to shred my leaves as small as possible and then just add them directly to the soil to work as a mulch in the garden. It breaks down to a nice dark rich soil.

You’re Expecting Instant Results

Compost is magic — but it’s slow magic. Depending on your method, ingredients, and environment, compost can take anywhere from 2 months to a year to fully break down.

Here’s the remedy:

Be patient and let nature take its course. In the meantime, check moisture, keep your ratio balanced, and turn occasionally. You can also try hot composting techniques if you want faster results, but for most backyard setups, a slower method works just fine. Hot composting has to be closely monitored.

🛠️ Tools & Supplies for Better Backyard Composting

You don’t need a fancy setup to start composting — but a few helpful tools can make the process smoother, cleaner, and more effective:

Compost Bin or Pile Area
Whether it’s a DIY pallet bin or a corner of your yard, you’ll need a designated space to build your pile.
Pitchfork or Garden Fork
This makes turning the compost so much easier, especially if you’re working with a large open pile.
Compost Thermometer (Optional)
Great for those experimenting with hot composting. It helps track the internal temperature to ensure decomposition is on track.
Chopper or Garden Shears
Breaking down large items (like corn stalks or cardboard) speeds up the process dramatically.
Kitchen Compost Pail or Countertop Bin
Collect scraps indoors without constant trips to the backyard. Look for one with a charcoal filter to minimize odor.
Shovel
Useful for layering browns and greens, turning the pile, or scooping finished compost.
Rain Cover or Tarp (Optional)
Helps keep excess moisture out during rainy seasons and retains heat in colder months.
Balance Chart or Checklist
A visual cheat sheet near your compost bin (or printed for the fridge) can remind you what to add — and what not to.

Final Thoughts on Composting and Gardening

Composting isn’t about perfection — it’s about learning and adjusting along the way. Even when things go a little off track, it’s usually easy to course correct. And once you start turning out crumbly, earthy compost? It’s hard not to get hooked.

By understanding these common pitfalls, you’ll be well on your way to building a rich foundation for your soil — one banana peel and leaf pile at a time.

This post was all about composting and gardening.