• The calcium carbonate in eggshells helps to strengthen a plant's roots so it can grow faster and stronger. Simply crush clean, dry eggshells into a fine powder. Add the powdered eggshells to boiling water, then cover and store the mixture for one week, uncovering it only once daily to stir it.
• Plants like tomatoes, peppers and eggplants in particular will benefit from shell fertilizer, Savio said. The extra calcium will help prevent blossom-end rot. Broccoli, cauliflower, Swiss chard, spinach and amaranth are also calcium-packed and could use extra from eggshells.
  
• Gently crush the outside of the egg and plant the eggshell inside of the new pot or garden, making sure it is completely buried. The egg shell will naturally decompose in the soil, giving your plants extra nutrients, making them both healthy and strong.
  
• Calcium, which is found in eggshells, is vital to all forms of plant life and is a "crucial regulator of growth and development," according to the American Society of Plant Biologists. For an extra boost of this nutrient, place a powder made from finely crushed eggshells into a watering can and fill it up.
  

The calcium carbonate in eggshells helps to strengthen a plant's roots so it can grow faster and stronger. Simply crush clean, dry eggshells into a fine powder. Add the powdered eggshells to boiling water, then cover and store the mixture for one week, uncovering it only once daily to stir it. Plants like tomatoes, peppers and eggplants in particular will benefit from shell fertilizer, Savio said. The extra calcium will help prevent blossom-end rot. Broccoli, cauliflower, Swiss chard, spinach and amaranth are also calcium-packed and could use extra from eggshells. Gently crush the outside of the egg and plant the eggshell inside of the new pot or garden, making sure it is completely buried. The egg shell will naturally decompose in the soil, giving your plants extra nutrients, making them both healthy and strong. Calcium, which is found in eggshells, is vital to all forms of plant life and is a "crucial regulator of growth and development," according to the American Society of Plant Biologists. For an extra boost of this nutrient, place a powder made from finely crushed eggshells into a watering can and fill it up.