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

7. Seaweed Extract: Mineral-Rich Marine Boost

Made from marine algae, seaweed extract is loaded with trace minerals, vitamins, and plant hormones that enhance growth and improve resistance to stress.

To use:
Dilute 1–2 tablespoons per gallon of water and apply every 2–4 weeks. Works well as a foliar spray or soil drench. Great for boosting plant resilience to drought, heat, and disease.

8. Coffee Grounds: Sustainable & Acidic

Used coffee grounds are a nitrogen-rich soil amendment that also improves structure and drainage. Slightly acidic, they’re ideal for plants like blueberries, azaleas, and rhododendrons.

To use:
Sprinkle around plants or mix into the soil at 1 cup per square foot. Can also be added to compost piles to enhance nitrogen content.

9. Green Manure: Living Soil Builders

Green manure refers to cover crops grown to be tilled into the soil for fertility and structure. Common types include clover, vetch, rye, and buckwheat. They help fix nitrogen, suppress weeds, and prevent erosion.

To use:
Sow in fall or early spring. Before flowering, cut down and till into the soil. Adds organic matter and boosts nutrient availability for future crops.

10. Epsom Salt: Magnesium for Lush Growth