7 Best Do-It-Yourself Garden Fertilizers

4. Egg shells :

Eggshells are very rich in calcium, which is necessary for good plant growth. If you’ve ever had tomato flowers rotting on your tomato plants, you probably have calcium-deficient soil. To remedy this, crush egg shells and bury them below the soil surface.

For best results, you can also use a spray by mixing 20 eggshells with 4 liters of water. Boil the eggshells in water for a few minutes and then let them steep in the water overnight. Use a strainer and pour the liquid into a spray bottle. Spray directly onto the ground.