10 Best slow release fertilizers of 2026

Save up to 31% off

Best Choice

1

HyR BRIX

HyR BRIX Slow-Release 16-7-10 Sweet Corn Fertilizer, 20lb Bucket - Corn Food with Calcium & Sulfur - Essential Micronutrients for Big, Uniform Ears & Sweet Flavor

13% Off
9.7

Exceptional

Our Rating
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Value for Money

2

Osmocote
Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 8 lbs.

15% Off
Main highlights

Long-Lasting Nutrient Supply
Osmocote provides up to 6 months of continuous feeding with 11 essential nutrients.

Versatile Plant Compatibility
Ideal for virtually all plant varieties and growing conditions, both indoor and outdoor.

Controlled Nutrient Release
Unique resin coating ensures plants receive nutrients as needed, praised for preventing over-fertilization.
Key specs
- Coverage:Full
- Product Dimensions:4.2 x 7 x 13.5 inches
- Application:1 scoopful 3 tablespoons
- Country of Origin:USA
- Item Form:Granules
9.6

Exceptional

Our Rating
3

Osmocote

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 2 lbs.

14% Off
9.5

Excellent

Our Rating

8.0
Fashion

8.0
worth the money

8.0
Simple to use
4

Osmocote

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 2 lbs.

14% Off
9.4

Excellent

Our Rating

8.0
Fashion

8.0
worth the money

8.0
Simple to use
5

Osmocote
Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 8 lbs.

19% Off
Main highlights

Long-Lasting Nutrient Supply
Osmocote provides up to 6 months of continuous feeding with 11 essential nutrients.

Versatile Plant Compatibility
Ideal for virtually all plant varieties and growing conditions, both indoor and outdoor.

Controlled Nutrient Release
Unique resin coating ensures plants receive nutrients as needed, praised for preventing over-fertilization.
Key specs
- Coverage:Full
- Product Dimensions:4.2 x 7 x 13.5 inches
- Application:1 scoopful 3 tablespoons
- Country of Origin:USA
- Item Form:Granules
9.3

Excellent

Our Rating
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6

Osmocote

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.

18% Off
9.2

Excellent

Our Rating

9.7
worth the money

9.5
Fashion

8.7
Simple to use
7

Osmocote

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.

18% Off
9.1

Excellent

Our Rating

9.7
worth the money

9.5
Fashion

8.7
Simple to use
8

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

16% Off
Main highlights

Essential Nutrients for Growth
Full of essential nutrients that nourish plants above and below soil.

Versatile Use Scenarios
Ideal for use in-ground and in containers, perfect for diverse gardening needs.

Ease of Use Praised
Customers love the easy shake application for consistent plant feeding.
Key specs
- Coverage:Feeds up to 3 months
- Product Dimensions:4.13 x 9.8 x 7.5 inches
- Application:In ground and containers
- Country of Origin:USA
- Item Form:N/A
9.0

Excellent

Our Rating

9.7
Simple to use

9.7
Easy to use

9.1
worth the money
9

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

16% Off
Main highlights

Essential Nutrients for Growth
Full of essential nutrients that nourish plants above and below soil.

Versatile Use Scenarios
Ideal for use in-ground and in containers, perfect for diverse gardening needs.

Ease of Use Praised
Customers love the easy shake application for consistent plant feeding.
Key specs
- Coverage:Feeds up to 3 months
- Product Dimensions:4.13 x 9.8 x 7.5 inches
- Application:In ground and containers
- Country of Origin:USA
- Item Form:N/A
8.9

Very Good

Our Rating

9.7
Simple to use

9.7
Easy to use

9.1
worth the money
10

Osmocote
Osmocote Smart-Release Plant Food Flower & Vegetable, 8 lb.

31% Off
Main highlights

Key Features and Benefits
Balanced NPK 14-14-14 formula promotes strong roots, vigorous growth. Soil temperature-regulated nutrient release ensures harmony with plant uptake.

Ideal Use Cases
Perfect for seasonal vegetables, perennials, and ornamentals. Ideal in vegetable gardens, around trees/shrubs, and raised beds.

Customer Reviews Highlight
Most praised for being mistake-proof and burn-free, even when over-applied, ensuring peace of mind for gardeners.
8.7

Very Good

Our Rating

9.9
Simple to use

9.9
Easy to use

9.7
Long life

10 Best slow release fertilizers of 2026

1

HyR BRIX Slow-Release 16-7-10 Sweet Corn Fertilizer, 20lb Bucket - Corn Food with Calcium & Sulfur - Essential Micronutrients for Big, Uniform Ears & Sweet Flavor

How do we rank?

How do we rank?

Analyzing top stores

2

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 8 lbs.

3

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 2 lbs.

8.0

8.0

8.0

4

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 2 lbs.

8.0

8.0

8.0

5

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential Nutrients, 8 lbs.

6

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.

9.7

9.5

8.7

7

Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.

9.7

9.5

8.7

8

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

9.7

9.7

9.1

9

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

9.7

9.7

9.1

10

Osmocote Smart-Release Plant Food Flower & Vegetable, 8 lb.

9.9

9.9

9.7

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