The Most Powerful Fertilizer For Onions, Tomatoes And Peppers

Achieving a bountiful harvest of onions, tomatoes, and peppers can be enhanced significantly with the right organic fertilizer. Combining wood ash, nettle, eggshells, and banana peels creates a potent mix that can boost your yield by up to 200%. Here’s how this combination works and how to use it effectively in your garden.

Benefits of Each Ingredient

  1. Wood Ash:
    • Potassium Source: Essential for flower and fruit development.
    • Soil pH: Helps to neutralize acidic soils, making nutrients more available to plants.
    • Micronutrients: Contains calcium, magnesium, and trace elements.
  2. Nettle:
    • Nitrogen Source: High in nitrogen, promoting leafy growth.
    • Micronutrients: Rich in iron, magnesium, sulfur, and calcium.
    • Growth Stimulants: Contains plant hormones that enhance growth and resilience.
  3. Eggshells:
    • Calcium Source: Prevents blossom end rot in tomatoes and peppers.
    • Soil Aeration: Improves soil structure.
  4. Banana Peels:
    • Potassium Source: Supports strong root development and healthy fruiting.
    • Phosphorus: Aids in flowering and root growth.

How to Prepare and Use the Fertilizer

  1. Collecting Ingredients:
    • Save wood ash from your fireplace or wood stove.
    • Gather nettles (wear gloves to avoid stings).
    • Save eggshells from your kitchen.
    • Collect banana peels.
  2. Preparation:
    • Wood Ash: Store in a dry container.
    • Nettle Tea: Soak nettles in water for a few days to create a nutrient-rich tea.
    • Eggshell Powder: Crush dried eggshells into a fine powder.
    • Banana Peel Tea: Soak banana peels in water for 2-3 days.
  3. Combining the Ingredients:
    • Mix 1 cup of wood ash, 1 quart of nettle tea, 1 cup of eggshell powder, and 1 quart of banana peel tea in a large container.
    • Dilute this mixture with 5 gallons of water.
  4. Application:
    • Soil Amendment: Before planting, mix the fertilizer into the soil to enrich it with essential nutrients.
    • Planting Holes: Add a handful of the mixture to each planting hole for onions, tomatoes, and peppers.
    • Top Dressing: Apply around the base of established plants every 2-3 weeks during the growing season.

Tips for Using the Fertilizer

  • Moderation: While powerful, use the fertilizer in moderation to avoid nutrient overload.
  • Balanced Diet: Combine with other organic matter like compost to ensure a balanced nutrient supply.
  • Monitor Plant Health: Adjust application rates based on plant response and soil conditions.


Using a homemade fertilizer blend of wood ash, nettle, eggshells, and banana peels can significantly enhance the growth and yield of onions, tomatoes, and peppers. This organic approach not only improves plant health but also contributes to sustainable gardening practices. Incorporate this powerful fertilizer into your gardening routine and enjoy a more productive and thriving garden.