Using Eggshells in the Garden

Using Eggshells in the Garden

By Adriana Findlay,
Marketing Manager, Manitoba Egg Farmers

Reduce kitchen waste by using crushed eggshells in your garden

As autumn settles in and gardens begin their seasonal transition, many gardeners look for sustainable ways to enrich their soil before winter. One effective and eco-friendly method is using crushed eggshells. Often discarded as kitchen waste, eggshells are a rich source of calcium that can significantly benefit your garden soil, especially during the fall season when soil preparation is key for spring planting.

Benefits of Crushed Eggshells in Soil

Calcium Enrichment
Eggshells are made of 95% calcium carbonate, a vital nutrient for plants. Adding crushed shells to the soil in autumn allows time for the calcium to break down and improve soil structure by spring.

 

pH Balancing
Calcium carbonate helps neutralize acidic soils. If your garden soil tends to be too acidic, eggshells can help bring it closer to a neutral pH, creating a neutral environment for most plants.

 

Improved Drainage and Aeration
When mixed into the soil, crushed eggshells enhance its texture, promoting better drainage and aeration. This is especially beneficial in clay-heavy soils that compact easily.

 

Pest Deterrent
Sharp edges of crushed shells can deter soft-bodied pests like slugs and cutworms. Sprinkling them around delicate plants can help reduce pest populations before spring growth begins.

 

Compost Booster
Eggshells decompose slowly, but when added to compost piles, they contribute valuable minerals and help balance nitrogen-rich materials, improving the overall quality of your compost.

How to Make Crushed Eggshells at Home: Step-by-Step Guide

Using eggshells in your garden is simple. Here’s how to make crushed eggshells at home:

 

Step 1: Collect eggshells

• After using eggs in your kitchen, save the shells.

 

Step 2: Dry the eggshells

• Spread the eggshells on a dry baking tray.
• Heat your oven to 400 °F (200°C). Bake for 10 minutes. This will remove all moisture from the shells, allowing them to remain shelf-stable.

 

Step 3: Crush the shells

• Once dry, crush the shells into small pieces. You can:
  • Place them in a sealed plastic bag and crush with a rolling pin or the back of a large utensil.
  • Use a food processor or blender for a finer powder (ideal for compost).

 

Step 4: Store or Apply

• Store crushed shells in a dry container until you’re ready to use them.
• In autumn, sprinkle them directly onto garden beds, mix into the soil, or add to your compost pile.

 

To view these instructions in a video, click here: 
https://www.instagram.com/reel/C8Hr0iVgo_M/?igsh=djl6Y3pyZnhxdzVo

Crushed eggshells are a simple, sustainable way to enrich your garden soil, especially in the autumn months when preparing for winter dormancy and spring growth. By recycling kitchen waste into valuable soil, you not only reduce household waste but also support a healthier, more productive garden ecosystem. You can buy fresh eggs from local regulated egg farms where eggs are sold in Manitoba.