How to Use Old Oyster Shells

So you’ve just finished eating a plate of scrumptious oysters and now you have a pile of shells. Here are some ways to use or dispose of your old oyster shells without throwing them in the trash. A lot of these suggestions came from our social community and our biggest thanks to everyone who sent us suggestions! 

Gardening

Oyster shells are composed of primarily calcium carbonate (aka chalk), which can help buffer soil acidity and provide plants and microbes with vital calcium. Plus, the texture of the oyster shell helps prevent soil compaction which can improve aeration. Oyster shells can be used in compost, as a soil additive, or as mulch. Just make sure you boil your oyster shells prior to using them in your garden to sterilize the shell. Crushing up your oyster shells can also help improve their effectiveness as a soil additive and in compost. 

Photo by WavebreakMediaMicro

Landscaping

Did you know that people across the US use roughly oysters to line paths by their house and even as a driveway material? Oysters can be a beautiful, affordable, and sustainable landscaping addition that can even help prevent erosion. 

Photo by Smithfield Gardens

Arts & Crafts

Cleaned oyster shells make beautiful ornaments, wreaths, and decorations. The smooth interior shell is perfect for painting and the sturdy shells are great for a wide variety of crafts. 

Photo by apieceofrainbow.com

Donate to a Shell Recycling Program

If you’re eating a substantial number of oysters (or ordered one of our bulk CSA add ons), you may consider reaching out to an oyster shell recycling program. Oyster programs such as the Mass Oyster Project collect and clean oyster shells then use the shells to seed new oyster beds. You can learn more about the Mass Oyster Project and shell recycling here. 

Do you have any additional suggestions for utilizing your oyster shells? Let us know in the comments!