Can You Compost Wine Corks? (If Yes, Then How?)

We all enjoy wine at our booze parties, but their corks go worthless once the bottle is empty. Do you have a bunch of wine corks but aren’t sure of ways to use them? If you have a green thumb, you’d be glad to know they could be mulched. And now you might be curious about composting them, too, right? So can you compost wine corks? Let us learn further about this.

Yes, you can compost wine corks as they give you carbon-rich humus and structure your compost but be sure to use natural cork. Moreover, cut the wine cork into small pieces and add green materials to your compost bin to quicken the decomposition.

How to Compost Wine Corks

Wine corks are natural materials stripped off from the cork oak. They are rich in carbon and add structure to your compost. But wine corks break down slowly due to their impermeable nature and thus must be composted carefully.

To quickly compost the wine corks, you need to add them in small pieces and mix them with green materials to generate heat. The hot composting is the best method for composting wine corks because it is aerobic and has rapid microbial action in the compost heap that will aid the decomposition process.

Brown Material For Composting

So, here are the brief steps you need to follow to compost wine corks effectively through the hot composting method:

Step 1. Set Up your Compost Bin

Buy a compost bin, or you can make one with an old plastic container or dustbin by drilling holes around them. Now, place the bin in a sunny corner and make sure not to use a lid.

You can also pile up your compost in a pit or leave it in your garden, where you get abundant sunshine.

Step 2. Collect Natural Wine Cork for Composting

Collect real cork from used wine bottles and make sure you are not using synthetic or plastic ones. Plastic corks are commonly used for capping wine bottles nowadays, but they should not go in your compost bin.

You can also consider using cork from bulletin boards, glass jars, or any other cork products devoid of glue, paint, or any non-biodegradable materials.

Step 3. Cut the Wine Corks

Remove the screw lid, plastic, foil, and other coverings and sterilize the corks in boiling water. Now use a knife to cut the wine corks into small pieces. The smaller the cork, the better it is.

Step 4. Add a Layer of Brown Materials

Spread the shredded cork evenly on the bottom of the compost bin. You can also mix them with other brown materials like dry leaves, paper towel shreddings, dry bark, and other yard waste.

Step 5. Add Green Composting Materials

Collect food waste like fruits and vegetable peels, coffee grounds, eggshells, and tea bags and layer them over the brown materials.

Avoid using meat, fish, and oily food scraps in the compost pile as they will spread a foul smell and breed unhealthy microbes in your compost bin.

Step 6. Repeat the Layers

Repeat adding wine corks and food scraps alternatively while watering each layer, and finally, complete the bedding process by sealing the top layer with soil.

It is required to balance brown and green materials as the Carbon-rich browns provide food to microbes, and Nitrogen-rich green materials help in the growth of microbes to accelerate the decomposition process of wine corks.

Step 7. Maintain the Compost

The compost bin should be hot (130-140 degrees) in order to carry out the cooking process of wine corks. Mix the composting materials and turn them in twice a week to oxygenate the compost pile.

You also need to check the moisture and water the bin regularly to keep the microbes healthy and active.

Rich brown soil or compost with an earthy smell will be ready in a few months, and you can add it to enrich your garden soil.

How Do You Cut Wine Corks?

It is essential to cut the corks into small pieces to use wine corks in the garden, especially for mulching or composting. But did you know it is not as simple as it appears to cut this spongy material?

So here are a few tips for cutting the wine corks easily:

  • Cut Them With Knife: This is the common method used to cut wine corks when they are in limited quantities. But make sure to use a serrated knife to make the cutting process easier.
  • Boil the Wine Corks: While heating, cork softens like other organic materials. Add the wine corks to boiling water and let them sit for 10 minutes. Now remove them and strain the water and let the wine corks cool. Once the temperature is down, you can cut them into smaller pieces using a knife.
  • Blend Your Cork: Another method to break the cork is to blend them into powder. This will make the composting process real quick. But when you consider mulching them, you need to be careful to prevent the cork from becoming fine powder.
Blended cork and soil mix

Benefits of Composting Wine Corks

Wine corks, like many other natural products, are compostable but are underrated due to the time they take to decompose. However, that doesn’t matter if you do it effectively. Well, if you have a second thought about composting these beautiful brown materials, here are a few benefits you need to know.

  • Wine corks add organic material to the soil and help in plant growth.
  • Real cork does not produce any toxic residues and is a great addition to your compost pile.
  • Corks help hold moisture in the compost heap.
  • Wine corks are biodegradable and 100% environmentally friendly.
  • They are a cheap source of fertilizer and are naturally made without using any synthetic chemicals.

Additional Tips for Composting Wine Corks

You might now know that wine corks are great for composting, but did you know they take years to break down if not done the right way. So here are a few tips you need to follow while composting wine corks.

  • Prior to composting wine corks, check if it is real cork. You can check this by cutting the cork. If it is foamy and even on the inner side, it is a synthetic cork. Natural cork does not look uniform. You can also light a match stick near the cork to identify the difference. If it melts, it is a plastic cork. 
  • Remove artificial materials attached to the corks like plastic, screw lids, and foil covers.
  • Chop the wine corks into small pieces to compost them quickly.
  • Add more green materials to the compost pile to make cork break down quickly.
  • Turn the compost pile regularly to promote aeration.

Can You Recycle Wine Corks?

Wine corks are recyclable as they are durable and are plant-based materials. Recycled wine corks can be turned into useful items like yoga blocks, bags, flooring, or shoes.

However, they can’t be recycled with normal doorstep recycling methods, but some companies like Recycle Now, TerraCycle, and ReCork accept wine corks and turn them into useful products. Cork Forest Conservation Alliance and ReCork, the largest cork recycling companies, have many collection centers in North America to recycle wine corks.

Wine Corks in Barrel for Recycling

Mulching with Wine Corks

Mulching is a great way to repurpose wine corks for your plants at home if you lack the composting setup. Like any other mulching materials, wine corks are excellent in conserving moisture, keeping the soil cool, and adding color to your garden. Furthermore, they do not retain water and are resistant to mold or fungus.

Because wine cork breaks down slowly, it eliminates the need to change the mulch frequently, and once decomposed, they add organic matter to the soil. Cork mulch protects the roots and inhibits weed growth.

To mulch your plants with cork, you need to cut them into pieces or grind them into a coarse structure. Now spread the ground mulch around your plants. But make sure to use only natural cork for mulching, just like in composting.

Since you might be short of wine corks to mulch your whole yard, you can use them to mulch your potted plants. They serve as an alternative to styrofoam and help with drainage.

Common Uses of Wine Corks In Garden

If you want to use wine corks for your garden but do not have a compost pile, worry not. There are several other methods to use cork in your garden. Here are a few you need to think about.

Tiny Succulent Grown in Wine Cork
  • Mulching your potted plants with wine corks.
  • Make a plant marker using the corks. This will help you identify different plants and where you have planted them.
  • You can build a beautiful fairy garden from your wine corks.
  • Use wine corks to make planters for small plants.
  • You can decorate your garden with a beautiful birdhouse made of wine corks.
  • DIY succulent wall magnets using wine corks.
  • Make a hanging cork planter.

Frequently Asked Questions

How long do wine corks take to decompose?

It takes a few years to compost wine corks as they are impermeable and have a hard outer layer that is resistant to mold, fungus, and water damage. Henceforth, the breakdown process will be slow. To speed up the process, you should add small pieces of cork to your compost pile along with plenty of green material.

Are wine corks good for your garden?

Wine corks are great for your garden as they conserve moisture and are antimicrobial, preventing mold. In addition, they act as mulch and nourish your soil while providing nutrients. You can also compost them to get organic-rich humus.

Why is Cork so Special?

The interesting feature about cork is that the cork wood can be harvested without cutting cork trees. Cork is made by stripping the outer bark of cork oak, and this bark regrows. The bark can be stripped off once in a decade from the adult trees, and a single cork tree can be used to harvest its bark 16 times in its lifetime.

Can You Reuse Wine Corks?

Corks are reusable as they are durable materials. To reuse the wine cork as a lid for other bottles, sterilize it by steaming or boiling it. Once they cool down, they can now be used to store wine bottles, homemade olive oil, and homemade vinegar. Wine corks can also be reused to make crafts or in the garden as planters, mulch, or composting material.

You can follow the zero waste method by recycling, reusing, or composting the natural wine cork. You can make some useful cork products like coasters, mats, chandeliers, or craft materials from recycled wine corks. Wine corks also have several uses in your gardens, like mulching and planting.

However, the better way to use wine corks is to compost them. This is eco-friendly and serves a purpose for your organic waste. So next time when you sip the wine, don’t forget to collect the cork and toss them in your compost bin.

Cardboard is yet another carbon-rich material for your plants and soil, like wine corks. But can you compost cardboard? Join us to know it all.