Best Slow Release Fertilizers

The Osmocote Smart-Release Plant Food Plus Outdoor & Indoor1 earns its spot on our list thanks to continuous release nutrition and use with virtually all plants. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $36.98, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The Osmocote Smart-Release Plant Food Plus Outdoor & Indoor1 earns its spot on our list thanks to continuous release nutrition and use with virtually all plants. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $13.68, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The Osmocote Smart-Release Plant Food Flower & Vegetable earns its spot on our list thanks to osmocote’s highest total nutrient formula and how to use. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $29.32, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The 10-10-10 Plant Fertilizer Slow Release earns its spot on our list thanks to 🌿 balanced 10-10-10 granular fertilizer for outdoor & indoor plants and ⏳ slow-release formula for continuous outdoor feeding. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $14.99, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The Osmocote Smart-Release Plant Food Flower & Vegetable earns its spot on our list thanks to promotes vigorous top-growth, strong root development and a must-have for vegetable gardeners. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $22.97, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The Schultz 018065 Spf48270 Slow-Release Bloom Fertilizer 3.5 Lbs earns its spot on our list thanks to 12-24-12 and size. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $13.66, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The Osmocote 4 Month 14-14-14 Slow Release Vegetable & Flower Plant Food Fertilizer earns its spot on our list thanks to slow release plant food and long-lasting formula. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $57.67, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The 10-10-10 Plant Fertilizer Slow Release earns its spot on our list thanks to 🌿 balanced 10-10-10 granular fertilizer for outdoor & indoor plants and ⏳ slow-release formula for continuous outdoor feeding. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $17.99, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The 10-10-10 Plant Fertilizer Slow Release earns its spot on our list thanks to 🌿 balanced 10-10-10 granular fertilizer for outdoor & indoor plants and ⏳ slow-release formula for continuous outdoor feeding. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $30.99, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.

The RAINFLOW 11.28OZ Slow Release Fertilizer earns its spot on our list thanks to balanced nitrogen fertilizer formula and organic fertilizer for plants. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $6.99, this model competes well against other slow release fertilizers in its class. For alternatives, check out our picks for best overall and best value options.