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Organic Plant Fertilizers

Best Organic Plant Fertilizers

Name: Miracle-Gro Fruit & Citrus Plant Food Spikes
Brand: Miracle-Gro
Price: 12.92 USD
Availability: InStock

From leading brands and best sellers available on the web.

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Southern Homewares

Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

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Miracle-Gro

25%OFF

Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.

9.8

score

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FoxFarm

FoxFarm Fertilizer Soil Trio Liquid Nutrient: Tiger Bloom, Grow Big, Big Bloom Bottles - (Pack of 3-1 Pint)

9.5

score

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Miracle-Gro

13%OFF

Miracle-Gro Indoor Plant Food, Liquid Plant Food for Houseplants, Snake Plants, Peace Lilies, Flowers, Vegetables, Herbs and More, 8 oz., 2-Pack

9.2

score

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Espoma

Espoma Organic Berry-Tone 4-3-4 Natural & Organic Fertilizer and Plant Food for All Berries. 4 lb. Bag. Use for Planting & Feeding to Promote Bountiful Harvest - Pack of 2

8.9

score

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Espoma

Espoma Organic Plant-Tone 5-3-3 Natural & Organic All Purpose Plant Food; 36 lb. Bag; The Original Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs

8.6

score

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Jobe's Organics

Jobe’s Organics Granular Garden Fertilizer, Easy Plant Care Fertilizer for Vegetable Gardens and Tomato Plants, 4 lbs Bag

8.3

score

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Espoma

17%OFF

Espoma Organic Plant-Tone 5-3-3 Natural & Organic All Purpose Plant Food; 4 lb. Bag; The Original Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs. - Pack of 2

8.0

score

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Espoma

61%OFF

Espoma Organic 8 Ounce Concentrated Indoor! Plant Food - Indoor Plant Fertilizer for Large & Small Plants Like Pothos, Fiddle Leaf Fig, Monstera, Snake & Palms

Espoma

Espoma Organic Citrus-Tone 5-2-6 Natural & Organic Fertilizer and Plant Food for All Citrus, Fruit, Nut & Avocado Trees; 4 lb. Bag. Promotes Vigorous Growth & Abundant Fruit

7.4

score

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Buying Guide for the Best Organic Plant Fertilizers

Choosing the right organic plant fertilizer can significantly impact the health and growth of your plants. Organic fertilizers are derived from natural sources and are an excellent choice for promoting sustainable gardening practices. When selecting an organic fertilizer, it's important to understand the key specifications and how they align with your gardening needs. This guide will help you navigate through the essential specs to make an informed decision.

N-P-K RatioThe N-P-K ratio represents the percentage of Nitrogen (N), Phosphorus (P), and Potassium (K) in the fertilizer. Nitrogen promotes leafy growth, Phosphorus supports root development and flowering, and Potassium enhances overall plant health. For leafy vegetables, a higher nitrogen content (e.g., 10-5-5) is beneficial. For flowering plants, a balanced or higher phosphorus ratio (e.g., 5-10-5) is ideal. Choose a ratio based on the specific needs of your plants.

Source of NutrientsOrganic fertilizers can be derived from various natural sources such as compost, manure, bone meal, and seaweed. Each source has its unique benefits. For example, compost is excellent for improving soil structure, while bone meal is rich in phosphorus. Understanding the source helps you select a fertilizer that complements your soil type and plant requirements. If you prefer a specific nutrient source, look for fertilizers that highlight it on the label.

Release RateThe release rate indicates how quickly the nutrients become available to plants. Organic fertilizers can be slow-release or fast-release. Slow-release fertilizers provide a steady supply of nutrients over time, which is ideal for long-term plant health. Fast-release fertilizers offer immediate nutrient availability, suitable for plants needing a quick boost. Consider your gardening schedule and plant needs when choosing the release rate. For consistent growth, slow-release is generally preferred.

Soil pH CompatibilitySoil pH compatibility ensures that the fertilizer will work effectively with your soil's pH level. Most plants thrive in slightly acidic to neutral pH (6.0-7.0). Some organic fertilizers can alter soil pH, so it's important to choose one that matches or adjusts your soil pH to the desired level. Test your soil pH before selecting a fertilizer to ensure compatibility and optimal nutrient uptake by your plants.

Micronutrient ContentMicronutrients such as iron, zinc, and magnesium are essential for plant health, even though they are needed in smaller quantities compared to macronutrients. Some organic fertilizers include these micronutrients, which can prevent deficiencies and promote vigorous growth. If your plants show signs of micronutrient deficiencies (e.g., yellowing leaves), choose a fertilizer that includes these essential elements. Check the label for a comprehensive list of nutrients.

Application MethodThe application method refers to how the fertilizer is applied to the plants. Common methods include granular, liquid, and foliar sprays. Granular fertilizers are easy to apply and provide a slow release of nutrients. Liquid fertilizers offer quick absorption and are ideal for immediate nutrient needs. Foliar sprays are applied directly to the leaves for rapid uptake. Choose an application method that fits your gardening routine and the specific needs of your plants.

Best Organic Plant Fertilizers

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Buying Guide for the Best Organic Plant Fertilizers