Best Organic Fertilizers of 2024

Best Organic Fertilizers of 2024


Plants require nutrition, and fertilizer aids in their growth. Organic fertilizers promote natural plant processes by feeding soil-dwelling microorganisms that deliver nutrients to plants. This improves soil quality, increases soil organic matter, and creates a better growing environment.

The best organic fertilizers provide a balance of nutrients, high-quality ingredients, and a method of application that is convenient for the gardener. In this guide, we list some of the best organic fertilizers on the market and provide advice on how to choose the best one for your domestic plants.


Jobe’s Organics 09524 Purpose Granular Fertilizer

Jobe’s Organics all-purpose granular fertilizer is a balanced (4-4-4 NPK) and fast-acting product made from feather meal, bone meal, processed poultry manure, and sulfate of potash. It contains beneficial archaea, bacteria, and fungi that help transfer nutrients to plants and improve soil structure over time. This fertilizer is suitable for almost all outdoor gardens and can be mixed with soil to minimize its odor during application.

Espoma Organic Plant Fertilizer

Espoma Plant-tone is a slow-release organic fertilizer (5-3-3 NPK) made from feather meal, poultry manure, cocoa meal, bone meal, cottonseed meal, greensand, humates, sulfate of potash, and sulfate of potash magnesia. It contains beneficial microbes that increase the fertilizer’s effectiveness and improve soil structure. This fertilizer is suitable for season-long use on flowers, vegetables, trees, and shrubs but not recommended for houseplants unless they will spend several weeks outdoors. Although it emits an odor, it can be minimized by mixing it into the soil, and any unused portion should be stored in a sealed container to prevent animals from being attracted to the scent.

Neptune’s Harvest Organic Hydrolized Fish & Seaweed Fertilizer

Neptune’s Harvest offers a convenient liquid concentrate fertilizer made from North Atlantic fish and seaweed. This 2-3-1 NPK organic fertilizer stimulates deep root growth and enhances flower and fruit quality with its high phosphorus ratio. It can be used for most types of indoor and outdoor plants by mixing it with water according to label directions and applying it to the root zone. 

The concentrated fish-based fertilizer has a strong odor, but it fades quickly, even when used on indoor plants. It’s important to handle it with gloves while diluting the concentrate. Houseplants require 1 tablespoon per gallon of water, while outdoor plants use ⅛ cup per gallon of water.

Jobe’s, Fertilizer Spikes

Jobe’s Organics fertilizer spikes are a mess-free and easy way to deliver 4-4-4 NPK plant food directly to a plant’s root zone. With 50 spikes included, they can be used for both indoor and outdoor plants. The spikes contain beneficial microbes that help break down the fertilizer and increase soil organic content, leading to improved plant health and disease resistance. However, it’s essential to fully insert each spike and cover it with soil to avoid the appearance of fuzzy white growth from mycorrhizal fungi.


When selecting the best organic fertilizer, consider factors such as plant type, nutrient content, and application method. Among the best options are Jobe’s Organics All-Purpose Fertilizer, Espoma Plant-tone, Sunday Wonderfert, and Neptune’s Harvest Fish and Seaweed Fertilizer, each with its own unique blend of organic ingredients and nutrients that promote healthy plant growth and soil health.

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