Looking for the best way to save and store coffee grounds and egg shells all winter long for next year’s garden – without having them mold and go bad?
When it comes to helping power plants and recharging your soil naturally, it’s hard to beat the power of using coffee grounds and egg shells. But sadly, during the gardening off-season, all too often these valuable kitchen scraps go to waste.
While it might be challenging to add these valuable ingredients to your compost pile in the winter, coffee grounds and eggshells can still be saved with ease for spring planting. In fact, with just a few simple and safe storage methods, you can keep these nutrient-packed materials all winter long and have a plentiful supply ready to use when garden season rolls around!
Both coffee grounds and egg shells have tremendous benefits when it comes to gardening. Not only are they wonderful in the compost pile, they are also great for protecting and energizing plants. And in a myriad of incredibly powerful ways!
Why You Should Be Saving & Storing Egg Shells & Coffee Grounds All Winter
Coffee grounds contain nitrogen and other key plant-loving minerals and nutrients. In addition, they also help to attract worms, all while adding better structure and water absorbing qualities to the soil.
Egg shells, meanwhile, also contain valuable nutrients that are helpful to plants and the soil. When mixed into the soil, these nutrients easily leach out and are absorbed by the roots of the plant. For all of those beneficial reasons and more, we put both materials down into every single planting hole in the spring.
Whether it’s planting our tomato, pepper and other vegetable transplants plants, or digging in all of our annual flowers around the farm, coffee grounds and egg shell remnants go into every hole. We also sprinkle both on top of many of our plants for added nutrients and to protect against pests.
Because of that, we need and use a lot of both at planting time. And the only way to make sure we have plenty on hand is to save our coffee grounds and egg shells all throughout the off season. But that can often be a bit tricky when it comes to storing them without having them mold or smell. But luckily, as you will see below, there is a simple solution to the problem!
The Best Way To Save & Store Coffee Grounds & Egg Shells – Without Having Them Mold!
Coffee grounds tend to be quite damp and moist coming out of a coffee maker. Storing them at room temperature, especially without first drying them a bit can often make them quick to mold. Unfortunately, even with drying them, they often absorb more moisture and still go moldy.
Egg shells quite often have the same issue. The wet, sticky, slimy interior of egg shells can also have room temperature shells molding fast. Even worse, with egg shells, it can create a nasty odor as well.
For these reasons, most who try to save egg shells and coffee grounds usually throw them out at the first sign of mold. They also abandon the thought of trying to save any in the future. But here’s the good news, with the most basic of prep for each – and by using just a bit of space in your freezer – you can safely and easily store them for months on end. All without having to worry about them molding or smelling!
Using Your Freezer To Safely Save & Store Coffee Grounds & Egg Shells
The freezer is actually the perfect storing space for both grounds and shells. By keeping the materials frozen, there is zero chance of mold or smell. Even better, you can take them out and use as needed, keeping the rest safe and sound in a deep freeze.
And if you are worrying about taking up too much space (especially with the egg shells), as you will see below, there is a quick and easy solution to that problem as well. With that in mind, here is a look at how to store each in a snap!
Storing Coffee Grounds In The Freezer – The Best Way To Save & Store Coffee Grounds & Egg Shells
Storing coffee grounds for the long haul is the most simple of all. There is really no reason or need to dry them out first if you will be freezing them. That’s because there will be no chance for mold to form in the freezer.
For us, we use a resealable plastic freezer bag that can be quickly opened and re-opened. Every morning, after the coffee is done brewing, we just pop the bag out of the freezer and scrape the grounds into the bag.
Even in a frozen state, the grounds are able to easily be crushed down. It makes it easy to keep the bag filled flat, saving tons of storage space in the freezer.
It’s important to scrape the coffee grounds off of the filter and not save both. Not only does it save space, the filter will freeze hard to the grounds making them hard to remove later. Most coffee filters are compostable. So if you happen to still have your compost pile going in the winter, by all means throw the filter and the small coffee ground remnants still sticking to it into your pile.
As for storing, we can usually fit about 75 to 100 coffee filter’s worth of grounds into a one gallon freezer bag. Saving a few bags up over winter and early spring certainly gives us plenty of grounds ready to go by planting time!
Listen In To Our Podcast Below On All Of The Great Ways You Can Use Coffee Grounds & Egg Shells In The Garden!
Storing Egg Shells In The Freezer – How To Store Coffee Grounds & Egg Shells For A Garden
With egg shells, the process is still simple, but it does involve an extra step or two. Although you could simply crumble up fresh eggs shells and pop them into a resealable plastic freezer bag, it can take up a lot of room.
By first grinding down the egg shells into a near powder-like substance, you can save substantial space. And it’s super easy and fast to do with a little hand held coffee grinder. Just toss in the shells and grind them down! Affiliate Product Link: Electric Coffee Grinder
Grinding your shells into a powder also has another huge additional benefit. Egg shells can take a long time to break down in larger bits and pieces. But egg shell powder is more easily absorbed into the soil. That means nutrients get to and power plants all the faster! See: The Truth About Egg Shells And Tomato Plants – How To Use Egg Shells Right!
We actually save a week or so of egg shells at a time. We then put them on an old cookie sheet in the oven to dry. To do this we set the oven on 200° (F) for about 20 to 30 minutes before grinding. This dries out the shells and makes grinding them quick, easy and mess-free.
Once ground up, simply pop your egg shell powder into the freezer exactly the same way as your coffee grounds. With just a little effort, you can no be more than ready for planting for success next spring. Here is to saving all of your egg shells and coffee grounds with ease this winter! Happy Gardening – Jim & Mary.
Old World Garden Farms
Jim and Mary Competti have been writing gardening, DIY and recipe articles and books for over 15 years from their 46 acre Ohio farm. The two are frequent speakers on all things gardening and love to travel in their spare time.
As always, feel free to email us at thefarm@owgarden.com with comments, questions, or to simply say hello! You can sign up for our free email list in the subscribe now box in the middle of this article. Follow us on Facebook here : OWG Facebook. This article may contain affiliate links.