Most Don’t Know: 10 Top Organic Fertilizers That Supercharge Your Plants

4. Fish Emulsion: Fast-Acting Liquid Fertilizer

Fish emulsion is made from whole fish or byproducts and is rich in nitrogen, phosphorus, potassium, trace minerals, and amino acids. It acts quickly, making it ideal for giving plants a nutrient boost.

To use:
Dilute at 1 tablespoon per gallon of water, and apply as a foliar spray or soil drench every 2–4 weeks. Great for leafy greens and nitrogen-loving crops.

5. Blood Meal: A Nitrogen Powerhouse

Blood meal is a dry powder made from animal blood and is one of the richest nitrogen sources, containing up to 13% nitrogen. It promotes lush, green growth.

To use:
Apply 1–2 pounds per 100 square feet, or mix into the soil before planting. Use cautiously—too much nitrogen can cause burning or excessive foliage growth at the expense of fruit or flowers.

6. Manure: The Classic Fertilizer

Manure from cows, horses, chickens, or sheep provides a rich source of nutrients and organic matter. It should be composted before use to kill pathogens and weed seeds.

To use:
Apply 20–30 pounds per 100 square feet and mix into the soil. Manure improves poor or depleted soils, boosts microbial activity, and enhances soil structure.

7. Seaweed Extract: Mineral-Rich Marine Boost