The Best Copper-Based Fungicides for Hydrangeas… According to Varsity, there are several cultivars of hydrangeas that do very well in the Chicago area landscape. The most common red hydrangea cultivar is called “Endless Summer” and the most common blue hydrangea cultivar is called “Himation Falls.” However, there are other varieties of hydrangeas available for landscaping your lawn and garden. Hydrangeas are difficult plants to grow. They have specific needs such as acidic soil, good drainage, and proper watering. And then you have to deal with insects and fungal infections. We’ll discuss copper-based fungicides you can use to treat this plant. If you want to get rid of fungus infections on your hydrangeas fast, you need to use one of the copper-based fungicides.
A copper fungicide can be applied as a spray, paint, or dust. It’s effective against a number of different fungal diseases of the hydrangea and some gardeners also use it on other species such as azaleas and rhododendrons. One of the most common types of fungal infection affecting the hydrangea plant is referred to as white rust. This condition is characterized by the development of white blisters and pustules on the leaves, stems, and flowers; it also affects the petals of the flower.
It also often appears on the underside of the leaves in which case it can clearly be seen. Sometimes it will also appear on the stems. There are various different ways that you can treat this type of fungal infection in order to eliminate it from your hydrangea plants. You may also want to try some preventative measures to ensure that you keep your plants healthy year-round so they are not at risk for developing this fungal infection in the first place.
Hydrangea leaf spot is a common disease in hydrangeas. It is caused by fungi that attack the leaves, stems, and flowers of hydrangeas. Spots appear on the upper surface of leaves as small brown or black lesions, surrounded by yellow halos. The spots can be very large and may spread to other areas of the plant, including stems and roots. Infected leaves may fall prematurely and cause flowers to fail to open, resulting in poor plant appearance and reduced vigor that limits further bloom production throughout the remainder of the season.
Hydrangea Care When Planting
When planting a hydrangea, plant it in full sun and in well-drained soil. Water regularly (once every other week during the spring and summer) to keep the soil moist but not soggy. Prune your hydrangea to keep it compact at least once per year after the blooming season is over and before new growth starts up again.
Causes Of Leaf Spot Disease On Hydrangeas
Hydrangeas are susceptible to several types of leaf spot diseases. The most common is anthracnose, which causes dark, brown spots on leaves and stems. Cercospora leaf spot causes circular, brown spots on the upper sides of leaves. If you have severe cases of leaf spot disease or repeated problems with these diseases, then copper fungicides may be an option for you.
What Is A Copper Spray For Hydrangeas?
Copper fungicides are broad-spectrum chemicals that kill many types of fungi. They are used to control diseases on leaves and stems, including leaf spots, powdery mildew, and rust.
Copper hydroxide is a type of copper fungicide that comes in two formulations: wettable powder and water-dispersible granules. The wettable powder form can be mixed with water to dilute it before spraying so you can use less product per acre than the granular form requires (see below).
Using Copper Fungicide On Hydrangea Leaves
- Spray the copper fungicide directly onto the hydrangea leaves. Be sure to follow label directions and use caution, as this is a powerful chemical.
- Do not apply the fungicide when temperatures are very high or when bees are actively foraging on these plants.
Can you use copper fungicide on hydrangeas?
You can use copper fungicide on hydrangeas. In fact, you should. Copper is one of the most effective and safest household fungicides available today, but it is still toxic to humans and animals if not used properly.
Follow package directions for mixing and applying copper fungicide to your hydrangea’s foliage or flowers with a sprayer that has adjustable pressure settings so that you get good coverage without damaging the plant’s leaves and flowers. Be sure to avoid spraying when bees are foraging or when temperatures are above 80 degrees F because they can be harmed by this treatment as well as people who come in contact with these areas after an application has been completed.
What is the best fungicide to use on hydrangeas?
The most effective fungicides for hydrangeas are chlorothalonil and thiophanate-methyl. These both help remove fungus caused by Cercospora and anthracnose. Use as directed on the label of each bottle. Usually, it needs to be applied every 10 to 14 days.
When should you not use a copper fungicide?
If you intend to use copper fungicide on your hydrangeas, keep in mind that it’s not a cure-all for all diseases. You should only spray when temperatures are between 65 and 90 degrees F. If the temperature is too high, the plant will be damaged by direct sunlight or burning. It’s also important to avoid spraying during drought stress, which can be caused by overwatering or heavy rain after a dry period.
List Of Copper Fungicide
Bonide 775 Copper Fungicide Rtu Natural 1 Qt
Price: $10.97
Features :
- CONTROLS PLANT DISEASES – Liquid Copper Fungicide helps control powdery mildew, downy mildew, black spot, peach leaf curl, rust, and many other listed diseases.
- PROTECTION FOR PLANTS – Designed for use on listed vegetables, roses, fruits, nuts, herbs, ornamentals, and turf.
- ORGANIC GARDENING – Approved and suitable for all of your organic gardening needs. It can even be used up to the day of harvest.
- CONTAINS COPPER – The active ingredient of Liquid Copper is Copper Octanoate or Copper Soap. Copper makes a great option for use on all of your plants.
- READY TO USE – This product is conveniently ready to use when it arrives. The spray nozzle makes this product easy to deploy.
Additional Info :
| Item Dimensions | |
| Height | 12 Inches |
| Width | 2.5 Inches |
| Length | 4.75 Inches |
| Weight | 1 Pounds |
Bonide 811 Copper 4E Fungicide 16oz (473ML)
Price: $15.99
Features :
- CONTROLS PLANT DISEASES – Liquid Copper Fungicide helps control powdery mildew, downy mildew, black spot, peach leaf curl, rust, and many other listed diseases.
- PROTECTION FOR PLANTS – Designed for use on listed vegetables, roses, fruits, nuts, herbs, ornamentals, and turf.
- ORGANIC GARDENING – Approved and suitable for all of your organic gardening needs. It can even be used up to the day of harvest.
- CONTAINS COPPER – The active ingredient of Liquid Copper is Copper Octanoate or Copper Soap. Copper is a naturally occurring chemical which makes it a much safer option for use on all of your plants.
- EASY TO APPLY – The product instantly mixes with water and should be applied using either a hose-end sprayer or a tank sprayer. Carefully read and use according to label directions.
Additional Info :
| Color | Copper |
| Item Dimensions | |
| Height | 1 Inches |
| Width | 1 Inches |
| Length | 1 Inches |
| Weight | 1 Pounds |
![BONIDE PRODUCTS 775 Ready-to-Use Copper Fungicide, 32-Ounce [2-Pack]](https://m.media-amazon.com/images/I/41JtIi1wdTL._SL500_.jpg)
BONIDE PRODUCTS 775 Ready-to-Use Copper Fungicide, 32-Ounce [2-Pack]
Price : $21.48
Features :
- 2-Pack of 32 oz (64 oz on total), Ready to Use, Copper Fungicide
Additional Info :
Monterey LG 3174 Ready to Use Fungicide & Bactericide for Control of Garden & Lawn Diseases, 32-Ounce RTU, 32 oz
Price : $16.98
Features :
- DISEASE CONTROL FOR PLANTS – Complete Disease Control prevents and stops powdery mildews, rust, leaf blight, brown rot, leaf spots anthracnose, gray mold, and other diseases affecting leaves, flowers, roots, and tubers.
- COLONIZES ROOT HAIRS – Monterey Complete Disease Control also colonizes the root hairs of plants. This helps in preventing the establishment of disease-causing fungi and bacteria.
- COMPLETE COVERAGE – This product is designed for use in and around homes and home gardens: houseplants, tropical plants, vegetables, ornamental and fruit trees, shrubs, lawns, flowers, bedding plants, and indoor and outdoor potted ornamental plants.
- READY TO USE – Complete Disease Control is conveniently ready to use when it arrives. The spray nozzle makes this product easy to deploy. Simply spray leaves, stems, and new shoots to runoff, providing complete coverage of the entire plant.
- ORGANIC GARDENING – Our fungicide is OMRI listed and approved for organic gardening. OMRI, The Organic Materials Review Institute, determines whether or not a product qualifies as organic under the USDA’s National Organic Program.
Additional Info :
| Color | 32 oz. |
| Item Dimensions | |
| Height | 10.9 Inches |
| Width | 2.3 Inches |
| Length | 5 Inches |
| Weight | 2.2 Pounds |
Bonide 814 Copper Fungicide, 32 oz, White, Orange
Price: $32.44
Features :
- CONTROLS PLANT DISEASES – Liquid Copper Fungicide helps control powdery mildew, downy mildew, black spot, peach leaf curl, rust, and many other listed diseases.
- PROTECTION FOR PLANTS – Designed for use on listed vegetables, roses, fruits, nuts, herbs, ornamentals, and turf.
- ORGANIC GARDENING – Approved and suitable for all of your organic gardening needs. It can even be used up to the day of harvest.
- CONTAINS COPPER – The active ingredient of Liquid Copper is Copper Octanoate or Copper Soap. Copper makes a great option for use on all of your plants.
- EASY TO APPLY – The product instantly mixes with water and should be applied using either a hose-end sprayer or a tank sprayer. Carefully read and use according to label directions.
Additional Info :
| Color | White, Orange |
| Item Dimensions | |
| Height | 11.88 Inches |
| Width | 4.88 Inches |
| Length | 2.5 Inches |
| Weight | 2.5 Pounds |
| Release Date | 2021-11-11T00:00:01Z |
In Conclusion
Copper-based fungicides are typically used to treat fungal diseases in plants. They work by stopping the growth of spores and hyphae. Although many copper-based fungicides are considered safe, there are a few that should not be used around hydrangeas, such as Bordeaux mixture and lime sulfur.
Hydrangeas require special care when using a fungicide because they have sensitive leaves that can burn easily. They also contain certain chemicals inside their leaves that make them susceptible to burning when exposed to certain pollutants in the air or soil.
Because copper-based fungicides are relatively safe for use around other plants and flowers, they are often used on hydrangeas as long as they are applied carefully to avoid burning the leaves.