10 Best systemic fungicides of 2026

Explore top picks

1

VivaGrow

Reliant Systemic Fungicide (Agri-Fos/Garden Phos) 1 Gallon
9.7

Exceptional

Our Rating
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2

VivaGrow

Reliant Systemic Fungicide (Agri-Fos/Garden Phos) 1 Gallon
9.4

Excellent

Our Rating
3

Bonide
Bonide Infuse Systemic Disease Control, 16 oz Concentrated Solution for Plant Disease Control, Long Lasting & Waterproof
Main highlights

Key Features
Broad spectrum, systemic disease control for turf and ornamentals. Effective on over 30 diseases, lasting up to 4 weeks per application.

Ideal Use Cases
Perfect for roses, flowers, lawns, trees, and shrubs suffering from rust, blight, powdery mildew, scab leaf spot, and other common diseases.

Customer Reviews Highlight
Most praised for its long-lasting effectiveness and ease of use, with noticeable improvements in plant health and appearance.
9.3

Excellent

Our Rating

9.7
Simple to use

9.1
Precision

8.7
worth the money
4

ferti-lome
Fertilome (11378) Liquid Systemic Fungicide II (32 oz)
Main highlights

Comprehensive Disease Control
Controls Take All Patch, Brown Patch, Dollar Spot, Leaf Spot, and more for healthier plants.

Ideal for Lawns and Gardens
Perfect for roses, flowers, lawns, and trees; apply early in the growing season.

Easy Mixing and Application
Highly praised for its ease of mixing and application by users.
Key specs
- Item Form:Liquid concentrate
- Product Dimensions:2.8 x 4.3 x 8.7 inches
- Application:Mix with water
- Country of Origin:USA
- NPK Ratio:N/A
9.2

Excellent

Our Rating
5

ferti-lome
Fertilome (11378) Liquid Systemic Fungicide II (32 oz)
Main highlights

Comprehensive Disease Control
Controls Take All Patch, Brown Patch, Dollar Spot, Leaf Spot, and more for healthier plants.

Ideal for Lawns and Gardens
Perfect for roses, flowers, lawns, and trees; apply early in the growing season.

Easy Mixing and Application
Highly praised for its ease of mixing and application by users.
Key specs
- Item Form:Liquid concentrate
- Product Dimensions:2.8 x 4.3 x 8.7 inches
- Application:Mix with water
- Country of Origin:USA
- NPK Ratio:N/A
9.1

Excellent

Our Rating
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6

BioAdvanced
BioAdvanced Disease Control for Roses, Flowers and Shrubs, Concentrate, 32 oz, 42 Gals of Spray
Main highlights

Cures and Prevents Diseases
BioAdvanced Disease Control effectively cures and prevents diseases like Black Spot and Powdery Mildew for roses, flowers, and shrubs.

Ideal for Rose Gardens
Perfect for maintaining healthy rose gardens, especially those affected by Black Spot and other common plant diseases.

Highly Praised for Effectiveness
Customers consistently praise its ability to revive plants and eliminate stubborn diseases without harming beneficial insects like bees.
9.0

Excellent

Our Rating

8.7
Simple to use

8.4
worth the money

8.0
Aroma
7

BioAdvanced
BioAdvanced Disease Control for Roses, Flowers and Shrubs, Concentrate, 32 oz, 42 Gals of Spray
Main highlights

Cures and Prevents Diseases
BioAdvanced Disease Control effectively cures and prevents diseases like Black Spot and Powdery Mildew for roses, flowers, and shrubs.

Ideal for Rose Gardens
Perfect for maintaining healthy rose gardens, especially those affected by Black Spot and other common plant diseases.

Highly Praised for Effectiveness
Customers consistently praise its ability to revive plants and eliminate stubborn diseases without harming beneficial insects like bees.
8.9

Very Good

Our Rating

8.7
Simple to use

8.4
worth the money

8.0
Aroma
8

Bonide
Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases
Main highlights

Copper Fungicide Benefits
Controls and prevents blight, black spot, and powdery mildew.

Ideal for Organic Gardening
Suitable for fruits, vegetables, and ornamentals, even until harvest.

Customer Praised Effectiveness
Highly effective in treating black spots on roses and other plants.
8.8

Very Good

Our Rating

9.3
Simple to use

8.2
Aroma

8.0
worth the money
9

Bonide
Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases
Main highlights

Copper Fungicide Benefits
Controls and prevents blight, black spot, and powdery mildew.

Ideal for Organic Gardening
Suitable for fruits, vegetables, and ornamentals, even until harvest.

Customer Praised Effectiveness
Highly effective in treating black spots on roses and other plants.
8.7

Very Good

Our Rating

9.3
Simple to use

8.2
Aroma

8.0
worth the money
10

Monterey

Monterey Garden Phos Bundled with Measuring Spoon - Fungicide for Root Rot, Downy Mildew, Fire Blight, Sudden Oak Death, Phytopthora & Pythium - 1 PT
8.6

Very Good

Our Rating

10 Best systemic fungicides of 2026

1

Reliant Systemic Fungicide (Agri-Fos/Garden Phos) 1 Gallon

How do we rank?

How do we rank?

Analyzing top stores

2

Reliant Systemic Fungicide (Agri-Fos/Garden Phos) 1 Gallon

3

Bonide Infuse Systemic Disease Control, 16 oz Concentrated Solution for Plant Disease Control, Long Lasting & Waterproof

9.7

9.1

8.7

4

Fertilome (11378) Liquid Systemic Fungicide II (32 oz)

5

Fertilome (11378) Liquid Systemic Fungicide II (32 oz)

6

BioAdvanced Disease Control for Roses, Flowers and Shrubs, Concentrate, 32 oz, 42 Gals of Spray

8.7

8.4

8.0

7

BioAdvanced Disease Control for Roses, Flowers and Shrubs, Concentrate, 32 oz, 42 Gals of Spray

8.7

8.4

8.0

8

Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases

9.3

8.2

8.0

9

Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases

9.3

8.2

8.0

10

Monterey Garden Phos Bundled with Measuring Spoon - Fungicide for Root Rot, Downy Mildew, Fire Blight, Sudden Oak Death, Phytopthora & Pythium - 1 PT

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