Best Fungicide For Roses of 2024: Top 6 Picks

By Harry RamosLast update: 2024-04-21

Although roses are exquisite, they require a lot of care. If not, it’s easy to get a disease especially fungus diseases. For the latter, you have to invest in the best fungicide for roses. If you make the right decision, you can treat fungus and other problems on your roses, even prevent their growth in the future. However, applying a wrong product on your roses can cause a more serious problem.

After researching, below are the top list of the best fungicides for roses on the market. However, determine your needs and the conditions of your roses to pick the most suitable one.

Here are the best fungicides for roses you can buy in 2024:

  • Best For Controlling Powdery Mildew: Bonide Captain Jack's Neem Oil
  • Best For Controlling Black Spot: BioAdvanced 3-In-1 Control
  • Fungicide & Bactericide Combo: Grower's Ally Fungicide
  • Best For Quick Results: Spectracide Immunox Multi-Purpose Fungicide
  • Best For Controlling Rust: Daconil Fungicide
  • Best For Long-lasting Disease Control: Bonide Infuse Systemic Disease Control
6 Best Fungicides For Roses
Best For Controlling Powdery Mildew
Bonide Captain Jack's Neem Oil
    Best For Controlling Black Spot
    BioAdvanced 3-In-1 Control
      Fungicide & Bactericide Combo
      Grower's Ally Fungicide
        Best For Quick Results
        Spectracide Immunox Multi-Purpose Fungicide
          Best For Controlling Rust
          Daconil Fungicide
            Best For Long-lasting Disease Control
            Bonide Infuse Systemic Disease Control

              Best For Controlling Powdery Mildew: Bonide Captain Jack's Neem Oil

              Bonide Captain Jack's Neem Oil
              Bonide Captain Jack's Neem Oil
              Pros
              • Easy to use
              • Safe for citrus
              Cons
              • Garlic–like odor

              According to the manufacturer, the Bonide Captain Jack’s Neem Oil is formulated for killing many species of attackers, but I strongly recommend it for controlling powdery mildew.

              Many customers used this product to treat the latter, and it brings an incredible result quickly. For example, powdery mildew has gone away from their potted plants after applying 3 times. Besides, it is also effective to treat bugs, aphids, and spider mites.

              Bonide Captain Jack's Neem Oil Specifications

              Volume

              32 Fluid Ounces

              Highlight Features

              Fungicide, miticide, and insecticide combo

              Ready-to-use bottle

              Verdict

              Although the Bonide Captain Jack's Neem Oil is formulated for killing many attackers, it works best on controlling powdery mildew.

              Best For Controlling Black Spot: BioAdvanced 3-In-1 Control

              BioAdvanced 3-In-1 Control
              BioAdvanced 3-In-1 Control
              Pros
              • Highly effective to remove aphids
              • A fair price
              • Quick to work
              Cons
              • A strong odor
              • Not safe on edible plants

              Black spot is listed in the “PROTECTS AGAINST DISEASE'' and roses are listed in the “WHERE TO USE” of this product, so it is formulated for controlling black spot on roses, of course. However, this is not the only reason I put it here.

              Customers said that the BioAdvanced 3-In-1 Control effectively minimizes black spots on their roses after some applications.

              BioAdvanced 3-In-1 Control Specifications

              Volume

              24 Fluid Ounces

              Active Ingredients

              0.012% Imidacloprid

              0.014% Tau-fluvalinate

              0.015% Tebuconazole

              Highlight Features

              3-in-1 formula

              Kill and control product

              Systemic rainproof protection

              Verdict

              The effect of the BioAdvanced 3-In-1 Control on controlling black spots on roses is proven by customers.

              Fungicide & Bactericide Combo: Grower's Ally Fungicide

              Grower's Ally Fungicide
              Grower's Ally Fungicide
              Pros
              • Easy to apply
              • Effective
              • Safe
              Cons
              • Hard to spray underside of the leaves because the bottle requires you to hold it upright perfectly

              Are your roses attacked by both fungus and bacteria? If so, choose the 2-in-1 Grower’s Ally Fungicide that is a fungicide and bactericide combo, so it can treat both problems at the same time.

              Grower's Ally Fungicide Specifications

              Volume

              8 Fluid Ounces

              Active Ingredients

              Citric Acid 1.07%

              Highlight Features

              Kill and prevent

              Verdict

              The Grower's Ally Fungicide can treat both of your roses’ problems (fungus and bacteria) at the same time.

              Best For Quick Results: Spectracide Immunox Multi-Purpose Fungicide

              Spectracide Immunox Multi-Purpose Fungicide
              Spectracide Immunox Multi-Purpose Fungicide
              Pros
              • Safe
              • Simple to use
              • Effective
              • Quick to work
              Cons
              • Terrible smell

              Are your roses seriously attacked by fungus? In this case, you need a quick-to-work product that can save them as soon as possible. The Spectracide Immunox Multi-Purpose Fungicide minimizes the damage on your roses because it works effectively enough to give a quick result. Apart from working as described, many people said that this product can work fast.

              Spectracide Immunox Multi-Purpose Fungicide Specifications

              Volume

              16 Fluid Ounces

              Highlight Features

              Multi-purpose formula

              Rainproof

              Verdict

              The Spectracide Immunox Multi-Purpose Fungicide works quickly, so it suits roses that are in a serious case.

              Best For Controlling Rust: Daconil Fungicide

              Daconil Fungicide
              Daconil Fungicide
              Pros
              • Effective
              • Fast to work
              • Easy to spray
              Cons
              • Expensive

              If you are looking for a fungicide that effectively controls rust on roses, here is it. The Daconil Fungicide is formulated to be used on flowers like roses for controlling rust and other diseases.

              Daconil Fungicide Specifications

              Volume

              2 Fluid Ounces

              Highlight Features

              Kills, stops, and prevents over 80 plant diseases

              Verdict

              Among all products in this list, the Daconil Fungicide works the best for controlling rust.

              Best For Long-lasting Disease Control: Bonide Infuse Systemic Disease Control

              Bonide Infuse Systemic Disease Control
              Bonide Infuse Systemic Disease Control
              Pros
              • Safe
              • Preventative
              • Quick to kill powdery mildew
              Cons
              • Pricey

              The Bonide Infuse Systemic Disease Control can give a long-lasting disease control because it not only kills present diseases but also prevents their growth on your roses in the future. Specifically, it can last for up to 4 weeks. You just need to reapply every 4-6 weeks. Customers also said that this product can prevent the recurrence of rust in the future.

              Bonide Infuse Systemic Disease Control Specifications

              Volume

              16 Fluid Ounces

              Highlight Features

              Stops and prevents

              Long-lasting disease control

              Verdict

              The Bonide Infuse Systemic Disease Control can control diseases for a long time, even prevent the growth of diseases in the future.

              How To Choose The Best Fungicide For Roses?

              What Is The Targeted Disease Of Your Roses?

              After determining the disease your roses are facing, let’s check the information on the product label to check if the targeted disease of your roses is listed on it. This way is pretty easy for most customers because not everyone knows which ingredient works well for a specific problem.

              However, to be sure, you can check the ingredients as well. For example, Sulphur, Protectant Mancozeb, Myclobutanil, and Penconazole are the active ingredients to treat black spots.

              Should You Choose Curative Or Preventive Fungicide?

              It depends on your needs. While curative fungicides can remove present fungal diseases, preventive fungicides will prevent the appearance of diseases.

              Most fungicides work on the prevention aspect. After applying, the spray will form a barrier on your roses to prevent the germination of fungal spores. But, fungicides that are formulated for preventing diseases will do better than normal fungicides.

              The earlier the disease diagnosis, the better the curative products work. Curative fungicides still bring excellent results with 1-2 days after infection. For longer infections, it’s hard to cure and remove disease spots and lesions completely, but many products are still effective enough to slow even stop the targeted disease. Depending on each specific case, choose an appropriate product because some fungicides have more curative properties than others.

              Which Brands Make The Best Fungicide For Roses?

              Bonide

              This leading brand has been famous since 1926. They provide their customers with high-quality products and solutions for lawn, home, and garden pest problems.

              FAQs

              What is the best time to apply fungicide on roses?

              If your roses have some spores in the winter, use a dormant spray, containing lime sulfur in January - after pruning for the first time of the season. After that, you can spray fungicide on your roses every 10 days from April to October. In case it’s in the rainy season, apply fungicide on roses every 5-7 days.

              What time of day do you spray fungicide on roses?

              The best time of day to spray fungicide on roses is early morning.

              Note: don’t spray on windy days because the wind element can lose the control on coverage. You can even spray it onto yourself when the wind blows it in the opposite direction.

              Does fungicide for roses work immediately?

              No.

              Does rain wash away fungicides for roses?

              If you use systemic fungicides, the plant tissues will absorb it, then redistribute it in the plant. Thus, it is less susceptible to be washed away by rain compared to protectant fungicides that just be applied on the outside of your plant.

              One-inch of rain will wash off 50% of the protectant fungicide residue. Meanwhile, 2 inches of rain can remove the spray residue completely.

              In case you choose sticky formulations that are applied with spreader-stickers, they can resist wash-off by rain.

              Can you spray fungicide on roses too often?

              No. How many times you spray fungicide on roses will depend on the climate in your area and how prevalent disease was in your roses in the previous season.

              Conclusion

              Why can’t your fungicide treat the problem on your roses? Perhaps you used it for the wrong purpose. Make sure that you know exactly what your roses are suffering to choose a suitable solution for the best effect. If not, you can make everything worse like spreading diseases.

              Now, you know what you must consider to make the right decision. Just buy one and tell me about your experience of using the best fungicide for roses.

              I’m Harry Ramos, who's crazy about all things green. I’m here to share some experience in my gardening adventure and how to choose the best products for your garden. Let's dig in, get our hands dirty, and celebrate the simple, earthy pleasures of the garden together!


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