Best Fungicide For Peonies of 2024: Top 6 Picks

By Harry RamosLast update: 2024-04-18

Peonies are one of the most beloved flowers in the world, but a bit tricky to grow as they’re prone to fungal infections. But don't let that discourage you! In this blog post, we’ll guide you through the best fungicide for peonies so you can keep your garden looking vibrant and colorful all season long. So, make sure to stay tuned and discover how to protect your precious perennials from pesky diseases effectively!

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

  • Fungicide, Insecticide & Miticide Combo: Garden Safe 511038
  • Best For Long-Lasting Disease Control: Bonide 811
  • Best For Fast Result: Spectracide 100507462
  • Best For Controlling Powdery Mildew: Daconil® 100523634
  • Best For Controlling Canker: Earth's Ally Fungicide Treatment
  • Best For Controlling Black Spot: BioAdvanced 701250
6 Best Fungicides For Peonies
Fungicide, Insecticide & Miticide Combo
Garden Safe 511038
    Best For Long-Lasting Disease Control
    Bonide 811
      Best For Fast Result
      Spectracide 100507462
        Best For Controlling Powdery Mildew
        Daconil® 100523634
          Best For Controlling Canker
          Earth's Ally Fungicide Treatment
            Best For Controlling Black Spot
            BioAdvanced 701250

              Fungicide, Insecticide & Miticide Combo: Garden Safe 511038

              Garden Safe 511038
              Garden Safe 511038
              Pros
              • Ability to control and prevent many fungal diseases - fungicide, insecticide, and miticide combo
              • Ready to use with no mixing required - a 24 fl. oz. spray bottle
              • Garden-friendly – ability to be applied up to and including the day of harvest
              Cons
              • The product may leave a residue behind on surfaces

              The Garden Safe 511038 is the best fungicide, insecticide, and miticide combo you can find on the market.

              It is labeled for use on peonies, so it can be applied at the first sign of spring budding to prevent rust leaf spot diseases, anthracnose, and scab. In mid-summer, applications can be made to prevent powdery mildew.

              The active ingredient in this product is triazole fungicide, which is the most widely used fungicide class in the world and is particularly effective at controlling fungal diseases in peonies.

              This fungicide is locally systemic, meaning it moves up and down the plant but not into the leaf, and it inhibits an enzyme that plays a role in fungi sterol production.

              Garden Safe 511038 Specifications

              Volume

              24 Fluid Ounces

              Active Ingredients

              Clarified Hydrophobic Extract of Neem Oil.

              Highlight Features

              fungicide, insecticide, and miticide combo

              a 24 fl. oz. spray bottle

              ability to be applied up to and including the day of harvest

              Verdict

              Looking for the best fungicide, insecticide, and miticide combo for peonies? Consider the Garden Safe 511038

              Best For Long-Lasting Disease Control: Bonide 811

              Bonide 811
              Bonide 811
              Pros
              • Deliver long-lasting disease control – the active ingredient being Copper Octanoate
              • Reliable - a patented formulation
              • Help reduce future damage - Can be applied before signs of disease are visible
              Cons
              • Potential of causing severe eye irritation if not properly handled
              • The product can cause injury to new growth

              If you are looking for a fungicide that delivers long-lasting disease control, pick copper-based products. Our recommendation for you is the Bonide 811.

              The active ingredient of this fungicide is Copper Octanoate at 10%.

              These copper ions act as contact fungicides, and they are effective against a wide range of plant diseases by killing the cells of pathogens before they even have a chance to infect the plant.

              They are also highly effective against bacterial diseases and stick to and remain active on plant surfaces, even during wet winter conditions.

              Furthermore, the material can be used up to the day of harvest, ensuring long-lasting protection for your peonies.

              Bonide 811 Specifications

              Volume

              16 Fluid Ounces

              Active Ingredients

              Copper Octanoate (copper Soap) 10%.

              Highlight Features

              the active ingredient being Copper Octanoate

              Can be applied before signs of disease are visible

              a patented formulation

              Verdict

              Compared to other contenders we tested, the Bonide 811 stands out for providing very long-lasting disease control.

              Best For Fast Result: Spectracide 100507462

              Spectracide 100507462
              Spectracide 100507462
              Pros
              • Deliver fast results – Myclobutanil
              • Not prone be washed off by rains – rainproof formula
              Cons
              • Must be applied every two weeks throughout the season

              The Spectracide 100507462 is specifically designed to cure and prevent all common diseases on ornamental shrubs, flowers, and roses, including those that affect peonies.

              It delivers fast results when used to treat a variety of fungal and bacterial diseases, such as powdery mildew, rust, black spot, and other common peony diseases.

              As a great plus, the spray concentrate is rainproof, so it’s not easily washed off by rains. It can provide continuous protection against disease for up to two weeks.

              Spectracide 100507462 Specifications

              Volume

              16 Fluid Ounces

              Active Ingredients

              Myclobutanil

              Highlight Features

              Myclobutanil

              rainproof formula

              Verdict

              Using the Spectracide 100507462, you don’t have to wait for so long. Its fast-acting formula can give you instant results.

              Best For Controlling Powdery Mildew: Daconil® 100523634

              Daconil® 100523634
              Daconil® 100523634
              Pros
              • Kills, stops, and prevents powdery mildew - Chlorothalonil 29.6%
              • Assured quality - Made in United States
              • Easy to use and apply
              Cons
              • Wish the lid was tighter
              • It has strong smell

              What's so special about the Daconil® 100523634 is it provides 3-way control to stop and prevent many fungal diseases in peonies, including powdery mildew.

              This concentrated fungicide features a built-in surfactant that helps it penetrate more deeply into the plant's roots where powdery mildew may be present. As a result, it offers more comprehensive control and greater protection against fungal infections.

              Aside from powdery mildew, this product also helps control other diseases that can affect peonies, such as Coffee Berry Disease (CBD).

              Daconil® 100523634 Specifications

              Volume

              2 Fluid Ounces

              Active Ingredients

              Chlorothalonil 29.6%.

              Highlight Features

              Chlorothalonil 29.6%

              Made in United States

              Verdict

              On the market for the best fungicide for controlling powdery mildew? Look no further. Try the Daconil® 100523634 now.

              Best For Controlling Canker: Earth's Ally Fungicide Treatment

              Earth's Ally Fungicide Treatment
              Earth's Ally Fungicide Treatment
              Pros
              • Effectively control canker - citric acid
              • Safe for pets, humans, and the environment - OMRI Listed
              • Economical & Cost efficient - Concentrate formula
              Cons
              • Not work well in humid climates

              Using a natural fungicide spray formulated with citric acid, the Earth's Ally Fungicide Treatment is incredibly effective at controlling canker.

              The citric acid in the formula kills the spores that cause canker to hence protect peonies from fungal infections.

              Rest assured, this active ingredient leaves no harmful residue on plants. It's also safe for pets, humans, and the environment.

              Because the Earth's Ally Fungicide Treatment is broad-spectrum, it not just works on canker but also many other plant diseases, such as downy mildew, blight, leaf spot, etc.

              Earth's Ally Fungicide Treatment Specifications

              Volume

              32 Ounces

              Active Ingredients

              Sodium Acetate, Sodium Benzoate, Potassium Sorbate, Ethyl Lactate, Citric Acid, Lactose, Water

              Highlight Features

              citric acid

              OMRI Listed formula

              Verdict

              If your peonies are struggling with canker, the Earth's Ally Fungicide Treatment is a fantastic solution for controlling this disease.

              Best For Controlling Black Spot: BioAdvanced 701250

              BioAdvanced 701250
              BioAdvanced 701250
              Pros
              • Best for controlling black spot - Imidacloprid, Tau-fluvalinate, and Tebuconazole
              • Easy to use - a pump-style tank
              • Safe for both people and the planet - EPA Registration
              Cons
              • Directions are unclear.

              We highly recommend the BioAdvanced 701250 for those seeking a fungicide that can help to control black spot.

              This product contains a systemic formula that is designed to treat and prevent listed diseases in peonies. Its active ingredients are Imidacloprid, Tau-fluvalinate, and Tebuconazole, which are all effective fungicides for controlling black spot.

              This product is also easy to use, with a pump-style tank.

              Additionally, it does not contain any harsh chemicals, so it is safer for both people and the environment than many other products available on the market.

              BioAdvanced 701250 Specifications

              Volume

              32 Fluid Ounces

              Active Ingredients

              Imidacloprid, Tau-fluvalinate, and Tebuconazole.

              Highlight Features

              Imidacloprid, Tau-fluvalinate, and Tebuconazole

              a pump-style tank

              EPA Registration

              Verdict

              If you want a fungicide for peonies that can control black spot effectively, the BioAdvanced 701250 is a great fit.

              How To Choose The Best Fungicide For Peonies?

              Consider The Climate In Which The Plants Are Grown

              When choosing a fungicide to use on peonies, it is important to consider the climate in which the plants are grown.

              If the fungus is active in cool climates, then a fungicide with broad-spectrum activity may be necessary. If the disease is active in warm climates, then a more specific fungicide may be required.

              The most common type of fungicide is mancozeb, which is a dithiocarbamate fungicide that works by inhibiting the growth of fungi.

              Mancozeb is best used when applied in late summer or early autumn before visible signs of disease appear. It has a wide range of activity against a variety of fungal diseases including powdery mildew, rust, and leaf spots.

              Thiophanate methyl is another popular fungicide used to protect against plant diseases.

              This fungicide works by disrupting the fungal cell walls, thus preventing the spread of disease. It is most effective when it is applied prior to visible disease symptoms, as it is not effective once the disease is established.

              Thiophanate methyl is also known to be more effective when used in combination with other fungicides such as mancozeb.

              Active Ingredients

              The best active ingredients for each disease in peonies will depend on the particular conditions in which the plant is growing and the specific situation of the disease itself.

              It is important to consider all factors before choosing the right active ingredients for each individual situation.

              Take an example:

              Botrytis is a fungal disease that can be managed through the use of fungicides, such as copper, captan, chlorothalonil (Daconil), mancozeb, maneb, sulfur, and thiophanate methyl.

              These fungicides can be used to spray the plants when young tips break through the ground, followed by an additional application two weeks later and every 14 days thereafter until mid-June.

              For ethylene damage, on the other hand, there are no specific active ingredients that can be used to treat the disease, but instead it is important to practice good management practices to prevent the disease from occurring in the first place.

              Other Factors To Consider

              There are some other factors that should be taken into consideration when choosing the best fungicide for peonies:

              • The product should be approved for use on peonies.
              • If used near your living area, make sure the product is not toxic to humans and animals
              • Cost of the fungicide
              • The convenience of the application. Make sure that the product is easy to apply.

              Which Brands Make The Best Fungicide For Peonies?

              Garden Safe

              Garden Safe is a great brand for fungicides for two reasons. First, it is safe to use around children and pets. Second, it can be used to prevent and control black spot, rust, powdery mildew, and other listed insect pests and mites.

              Bonide

              Bonide has been providing safe and effective organic and natural gardening solutions since 1926. Its all-purpose fungicide products can be used on virtually any plant and can be used as a dormant spray to help protect plants from insect and disease infestations.

              FAQs

              When should you not use fungicide for peonies?

              You should not use fungicide for peonies during mid-June or later, as the disease pressure will be lower.

              How often should you apply fungicide for peonies?

              It is generally recommended to apply a fungicide once in the spring, when new growth of peony tips breaks through the ground. Additionally, it may be necessary to apply fungal treatments throughout the growing season.

              What happens if you use too much fungicide for peonies?

              If too much fungicide is used on peonies, it can cause damage to the plant and its environment.

              Too much fungicide can lead to reduced growth, yellowing leaves, stunted root systems, and even death of the plant.

              Additionally, it can be toxic to beneficial soil organisms and cause runoff pollution into nearby water systems.

              What time of day do you spray fungicide for peonies?

              It is best to spray fungicide for peonies in the early morning or late evening when the temperatures are cooler and the sun is not as strong, as spraying fungicide during the hottest hours of the day may cause leaf burn.

              Does rain wash away fungicide for peonies?

              Yes, rain can wash away fungicide for peonies if the fungicide floats in the air.

              To prevent this, it is important to apply liquid fertilizer or mix baking soda with dormant oil and insecticidal or liquid soap into the soil and make sure to water it thoroughly.

              Conclusion

              So we have walked you through everything needed to find the best fungicide for peonies.

              Depending on the type of damage that needs to be treated, you may opt for a preventative fungicide treatment or even choose one specifically designed to treat existing fungal diseases.

              With careful attention and regular observation, your precious peonies will remain healthy, beautiful blooms throughout the growing season.

              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!


              Related Articles