By July, many compost bins seem to slow to a crawl. Kitchen scraps sit on top for days, grass clippings turn into a slimy mess and the pile no longer shrinks as quickly as it did in spring.
It’s easy to assume something has gone wrong, but in many cases the problem comes down to one simple mistake: not keeping the compost balanced as summer progresses.
Here’s the July compost secret that many beginners miss—and how a few small changes can get your compost working efficiently again.
1. Stop Adding Only Grass Clippings
July often means mowing the lawn every week, which can lead to one common problem: a compost bin full of nothing but fresh grass clippings.
Grass is rich in nitrogen and breaks down quickly, but large amounts clump together, restricting airflow. Instead of producing good compost, the pile can become wet, slimy and unpleasant to turn.
For every generous layer of grass, add a layer of dry “brown” material such as shredded cardboard, torn newspaper, dry leaves or small woody prunings. This helps maintain the balance needed for efficient composting.
2. Turn the Compost More Often
Warm summer weather creates ideal conditions for composting—provided enough oxygen reaches the centre of the heap.
Turning the compost every week or two mixes fresh material with older layers, introduces air and helps microorganisms break everything down more evenly.
Even a quick turn with a garden fork can make a noticeable difference.
3. Check the Moisture Level
Compost should feel like a wrung-out sponge—moist but not dripping wet.
Hot weather can dry out exposed heaps surprisingly quickly, slowing decomposition. On the other hand, prolonged rain or too many fresh green materials can leave the compost waterlogged.
If the heap feels dry, lightly water it while turning. If it’s soggy, mix in more dry brown materials to absorb excess moisture and improve airflow.
4. Chop Materials Before Adding Them
Large stems, whole leaves and thick cardboard take much longer to decompose.
Spending a couple of minutes chopping prunings into smaller pieces or tearing cardboard before adding it to the compost bin gives microorganisms much more surface area to work on.
It’s a simple habit that often speeds up composting without any extra effort later.
5. Leave Out the Wrong Ingredients
When the compost slows down, some gardeners are tempted to throw in almost anything.
To keep your compost healthy, avoid adding:
- Meat or fish scraps.
- Dairy products.
- Cooked food containing oils or fats.
- Dog or cat waste.
- Persistent perennial weeds with mature seed heads.
- Plants badly affected by disease.
Sticking to suitable compost materials helps prevent smells and reduces the risk of unwanted pests.
6. Don’t Forget to Harvest Finished Compost
Many compost bins contain usable compost at the bottom while fresh material continues to be added on top.
If the lower layers have become dark, crumbly and earthy-smelling, they’re ready to use around borders, vegetable beds or containers.
Removing finished compost also creates space for fresh ingredients and improves airflow within the bin.
7. Let Nature Do Most of the Work
The biggest secret isn’t a special compost activator or expensive bin.
Healthy compost is created by billions of naturally occurring bacteria, fungi and other organisms working together. Your job is simply to give them the right conditions: a good balance of green and brown materials, enough moisture and plenty of air.
Once those basics are in place, nature does the rest.
A Simple July Compost Checklist
A quick monthly check can keep your compost working efficiently throughout summer.
- Balance fresh grass with dry brown materials.
- Turn the heap every week or two.
- Check that it’s moist but not waterlogged.
- Chop bulky materials before adding them.
- Harvest finished compost from the bottom of the bin.
- Keep adding a varied mix of garden and kitchen waste.
These small jobs take only a few minutes but can make a big difference to the quality of the finished compost.
Final Thoughts
If your compost seems to have stalled this July, don’t assume it’s failing. More often than not, it simply needs a little more balance.
Adding brown materials alongside grass clippings, turning the heap regularly and keeping an eye on moisture levels are usually enough to get everything working again.
With a few minutes of attention now, you’ll be rewarded with rich, crumbly compost that’s perfect for improving your soil and feeding your plants in the months ahead.
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