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4.6 out of 5 stars. 144 reviews
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Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening

4.6

(144 Reviews)

|

Item # 1232743

$17.99
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A woman outside with a dog

Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening

Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening

Item # 1232743

Stocked & Ready
Bonide Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening
Bonide Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening


Spend $49.99 to unlock free delivery!

Notice:
This Item cannot be shipped to AK, DC, HI.
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Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening

Item # 1232743

Stocked & Ready
Bonide Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening
Bonide Bonide 16 oz. Captain Jack's Copper Fungicide, Concentrated Plant Disease Control Solution for Organic Gardening

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Grassland (franklin) TN

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Control common plant diseases in your lawn and home garden with Captain Jack's Ready-to-Spray Liquid Copper Fungicide. Approved for organic gardening, Copper Fungicide can be used on a variety of listed fruits, vegetables, nuts, herbs and flowers, and can even be applied up to the day of harvest. Captain Jack's Copper Fungicide is effective against common fungal diseases including downy mildew, black rot, leaf spot, powdery mildew, blight, peach leaf curl and more. This product arrives conveniently ready-to-mix. For best results, mix according to label and apply using a plant sprayer. Apply thoroughly to the tops and undersides of leaves and all plant surfaces on affected plants. Repeat every 7-10 days as needed. Please see product label for full use instructions.

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

  • Control fungus and disease in your garden with Captain Jacks Liquid Copper Fungicide Concentrate
  • Approved for organic gardening, this fungicide is suitable for the production of organic produce and can even be used up until the day of harvest
  • Copper Fungicide effective in the control and prevention of a wide range of plant diseases; listed common garden diseases include blight, black spot, powdery mildew peach leaf curl and more
  • Apply copper fungicide to fruits, vegetables, ornamentals and other plants in your lawn and garden for complete and long-lasting disease control
  • This product arrives conveniently ready-to-mix; to use, mix with water according to package directions and thoroughly apply to affected plants; please see product label for full use instructions

Q&As

1 - 10 of 79 Questions

Q: Will this treat and kill Dogwood anthracnose?

10 days ago
2 Answers
  • Team Bonide
    A: Hi! Yes, Bonide Captain Jack's Copper Fungicide Concentrate will treat and help control Dogwood anthracnose.
    7 days ago
    Helpful?

Q: How much diluted product does 2 ounces of oncentrate make

14 days ago
2 Answers
  • Team Bonide
    A: Hi The amount of finished spray depends on the disease and application rate. Captain Jack’s Copper Fungicide Concentrate is used at ½–2 fl oz per gallon of water, so 2 fl oz of concentrate makes approximately 1–4 gallons of finished spray. Please refer to the product label for the specific rate for your plant and disease.
    4 hours ago
    Helpful?

Q: can this be used to treat needle cast on my blue spruce

a month ago
1 Answer
  • A: Howdy neighbor! Yes, Bonide Captain Jack's Copper Fungicide can be used to treat needle cast on your blue spruce, but timing is everything because it will only protect new growth and cannot cure needles that have already turned brown.
    29 days ago
    Helpful?

Q: Is this effective to treat pear tree fire blight?

a month ago
1 Answer
  • A: Howdy neighbor! Bonide Captain Jack's Copper Fungicide is highly effective as a preventative shield against pear tree fire blight, but it cannot cure an active infection once the branches have already turned black. Because fire blight is a destructive bacterial disease rather than a fungus, copper works by killing the bacteria on the bark and blossoms before it can enter the tree. For the best results and to protect your tree from leaf damage, apply this spray during the late winter dormant season or early spring just as the buds begin to swell.
    a month ago
    Helpful?

Q: Will this kill an already existing powdery mildew infection?

a month ago
1 Answer
  • AI-generated, Human-approved
    A: Yes, this fungicide is effective for both the control and prevention of powdery mildew. For best results, apply it thoroughly to all plant surfaces, including the tops and undersides of leaves, and repeat every 7 to 10 days as needed.
    a month ago
    Helpful?

Q: Where is it in the Mt Pleasant store

a month ago
1 Answer
  • A: To check local inventory for a specific item, you can use the Tractor Supply Store Locator directly from any product page. This ensures you see accurate localized pricing and availability for your area. Steps to View Local Inventory: Locate the Store Selector: Look for the store or location prompt, usually found in the top navigation bar or near the "Add to Cart" button on the product page. Enter Your Zip Code: Input your 5-digit U.S. zip code into the search box to find nearby locations. Set Your Preferred Store: Select "Make my store" for the most convenient location to update the product page with that specific store's stock status. Check Availability: The product page will now display if the item is "In Stock" at your chosen store or eligible for Buy Online, Pick Up In Store.
    a month ago
    Helpful?

Q: Is this product appropriate for grass lawns?

a month ago
2 Answers
  • Team Bonide
    A: Yes, Captain Jack's Copper Fungicide is labeled for use on turf and can be used to control certain listed lawn diseases.
    8 days ago
    Helpful?

Q: does it have cholronthanil in it

a month ago
1 Answer
  • AI-generated, Human-approved
    A: No, this product does not contain chlorothalonil. Its active ingredient is 10% Copper Octanoate (Copper Soap).
    a month ago
    Helpful?

Q: Is this safe with pets

2 months ago
1 Answer
  • AI-generated, Human-approved
    A: Yes, this product is safe for pets once it has thoroughly dried. It is recommended to keep pets out of the application area while you are spraying and until the solution is completely dry.
    a month ago
    Helpful?

Q: Is it safe to get on vegetables

2 months ago
1 Answer
  • AI-generated, Human-approved
    A: Yes, this fungicide is safe for use on a variety of vegetables and is approved for organic gardening. It can even be applied up to the day of harvest to control common diseases like blight and powdery mildew.
    2 months ago
    Helpful?
1 - 10 of 79 Questions

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Reviews

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105 reviews with 5 stars.
26 reviews with 4 stars.
8 reviews with 3 stars.
1 review with 2 stars.
4 reviews with 1 star.

Overall Rating

4.6
12 out of 14 (86%) reviewers recommend this product

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  • copper
  • growth
  • purchase
  • convenient
  • ease of use
  • for cold weather
  • for school use
  • functional
5 to 34 of 144 Reviews .
1 – 30 of 144 Reviews
Indiana
Review 1

All purpose fungicide

a year ago
Easy-to-use directions and application
SweepstakesYes

Yes, I recommend this product.

Review 1

Works good on roses!

a year ago
My mother’s roses responded well to this fungicide! The directions are easy to follow and the ingredients aren’t crazy. I’m still a little cautious about putting it on vegetables you’ll eat but I’m sure it works good on that too.

Originally posted on bonide

Review 1

Great quality product!

2 years ago
My Don Juna picked up a bit of powdery mildew. Caught it early and this stuff knocked it out. Rose is growing great in it's first season. Highly recommend!

Originally posted on bonide

Review 1

great product and useful

2 years ago
this is so effective it doesn’t really have much of a scent but it’s such a good value and I really liked the packaging and it’s super easy to use so I definitely would recommend this because yeah it’s great to take care of your plants

Originally posted on bonide

Review 1

Plant medicine

2 years ago
This product saved my peppers !! I like the lid as a cup . Price is good and easy application. I recommend this product to gardeners. it does what it says it does .

Originally posted on bonide

Review 1

Effective, but BYO sprayer

2 years ago
I like to use copper as a fungicide on my edible plants rather than a synthetic product. This was effective at improving leaf condition after a difficult summer for the garden. Do keep in mind that you'll need to mix this up with water in a garden sprayer -- it's not a ready to use product. Diluting the product according to directions means a little goes a long way

Originally posted on bonide

Review 1

Help your plants !!!!

2 years ago
⁦I recently had a couple of houseplants that all had some sort of fungus. When I received this product, I was thrilled because it's exactly what I needed and it was right on time!! I followed the directions and used the product, immediately. First you trim all the brown spots from the leaves, then spray both top and bottom of each leaf. It worked perfectly, leaving no more brown spots and within only a few days! The application is simple, as are the directions. There's no scent, I'm my opinion. This product is great for the cost and it can be used up to the day of harvest.

Originally posted on bonide

Review 1

Undecided

2 years ago
Jury’s out on this one. I can’t really tell that it did much for my lawn. Maybe it needs longer to show progress. I’ll have to come back and update this.

Originally posted on bonide

Review 1

Effective and Fast-working!

2 years ago
⁦I recently had a couple of houseplants that all had some sort of fungus. The leaves would get brown spots that continued to grow till the leaf fell off. When I received this product, I was thrilled because it's exactly what I needed and it was right on time!! I followed the directions and used the product, immediately. First you trim all the brown spots from the leaves, then spray both top and bottom of each leaf. It worked perfectly, leaving no more brown spots and within only a few days! I am continuing weekly treatments and the plants are healthy again. If you follow the instructions, the results are amazing! 10/10 would recommend.

Originally posted on bonide

Review 1

Holy grail

2 years ago
I wish I had a before photo, but I have had this rosebush for eight years and it has never been this healthy or had this many blooms! The only thing I’ve done is add this product. I will religiously use this on my roses from now on. 

Originally posted on bonide

Review 1

My plants are thankful!

2 years ago
Lately I’ve been giving my green thumb a try, and this copper fungicide help me achieve my healthy plant goals! It kept any signs of mildew or rot away from my little garden. This is a must have if you want a flourishing garden! Thank you influenster for this product in exchange for my review!

Originally posted on bonide

Review 1

Easy application and effective

2 years ago
Bonide is an excellent brand, and I use many of their products on my houseplants. This copper fungicide, in particular, worked great for an issue I was having with one of my plants. I just mixed it as directed into a spray bottle and applied it to all the leaves on my plant. I did this 3 times in a month, and the issue is gone. The application is simple, as are the directions. There's no scent, I'm my opinion. I just suggest keeping the plant out of direct sunlight for a few days following application. You can not go wrong with this brand. It truly is one of the best out there.

Originally posted on bonide

Review 1

Great product for the price

2 years ago
The captain jacks copper fungicide works great. I use it on my garden when I start to see a powdery mildew and also on my yard during the rainy months to keep the fungus down. This product is great for the cost and it can be used up to the day of harvest.

Originally posted on bonide

Review 1

Effective treatment

2 years ago
This saved my roses. They were being eaten by something and nothing I did helped. I’ve used this a few times. Mostly after it rains and my roses have come back to life! It smells like old school shampoo and goes on evenly. Easy to mix and apply.

Originally posted on bonide

Review 1

Tried with indoor plant

2 years ago
It provides a list of plants to use the product with the ensure the correct measurements. However, at the time I received it - my aloe plant was in bad shape. Opened it and was very surprised by the bright blue hue. It got on my fingers but did not stain. I haven’t seen any differences in my plant but I am continuing to monitor it!

Originally posted on bonide

Review 1

Reliable choice!

2 years ago
Captain Jack's Liquid Copper Fungicide Concentrate is a reliable choice for gardeners dealing with fungal issues. Its primary advantage is its broad-spectrum effectiveness against a variety of common plant diseases, including rust, mildew, and blight. The concentrate form allows for custom dilution, making it cost-effective and versatile. However, its copper base means it should be used with caution to avoid over-application, which can lead to copper buildup in the soil. Overall, it’s a solid product for maintaining plant health when used according to the directions.

Originally posted on bonide

Review 1

Help your plants! Use this!

2 years ago
I love that this doesn't have pesticides in it and is organic! It works great if used as directed and applied every 7-10 days! It helped my rose plants with the diseases they get, and I am very pleased!

Originally posted on bonide

Review 1

Works great

2 years ago
Thank you Influenster for letting me review this copper fungicide. With the crazy weather we are having, my plants outside have taken a hit. It was easy to use and all you have to do is add it to a spray bottle with water. I noticed a different within 2 weeks.

Originally posted on bonide

Review 1

It works!

2 years ago
I was gifted this product for my honest opinion. I grow indoor mint and roses which are extremely prone to powdery mildew. No matter what I tried, I wasn’t able to get rid of it. I was hesitant to use a chemical fungicide since I consume the mint, but this one is food safe. I love the guide that it comes with that specifies how much of the product to use for which plants. It is very easy to use, and is suitable for a wide variety of plants. I’ve definitely noticed a reduction in powdery mildew ever since I started using this product. Some areas were too far gone to be saved, but I did see a noticeable effect in most areas of my plants.

Originally posted on bonide

Review 1

This worked for my apple tree!

2 years ago
I purchased a bare root apple tree early this spring and it had begun to get leaves and blossoms. After a couple days of stormy weather though, it had spots all over the leaves! We applied the copper fungicide, and crossed our fingers. The new growth is perfectly healthy! We’re so relieved, and will be using this again! The photo shows before and the healthy new leaves.

Originally posted on bonide

Review 1

SATISFIED

2 years ago
I got Captain Jack's Luquid Copper Fungicide Concentrate and I am very satisfied and the quick results of preventing and protecting my plants from bacterial/fungal diseases, I like how I can use this product on a variety of plants, easy to apply with a comfortable scent, and is at a good value. I am pleased using this product and I highly recommend it.

Originally posted on bonide

Review 1

Captain Jack’s fungicide, for all your plant needs!

2 years ago
Captain Jack organic products is a great line for your indoor/outdoor gardening needs. Currently we only have an indoor/outdoor need for this item. We intend on beginning to grow more herbs and veggies in the near future. This copper fungicide is great because it can be utilized on your ornamental items in your garden, as well as your edibles. We currently have several rosebushes and this will come in handy to help ward off things such as: Powdery mildew and black spot. We have a few small plants inside the home which seem to do OK, but having this product to treat those potential issues, puts me at ease. We’ve use this product in the past, and it was amazing at ridding our plants of several types of diseases and in a very quick time frame. we have lots of Captain Jack products. I most definitely recommend this brand. This bottle’s retail value is pretty good for the cost, it’s great that it’s a “ready to mix” formula and you’ll get a lot of use out of it. The packaging makes it very easy to get to get to the product, to measure out for the ready to mix formula. Just follow the instructions on the package and you are good to go. The product has a pretty distinct smell, as I feel all organic products do. I like it, It assures me that it’s an authentic product.

Originally posted on bonide

Review 1

Garden Treatments

2 years ago
This brand is my go to for any gardening problems. I can always count on them to have a working solution. I had recently used their bug repellent for the veggies in my garden and now I will use this copper treatment for my fruit trees as it always ends up dying when it gets this disease.

Originally posted on bonide

Review 1

Great for mold and curling leaves

2 years ago
This is a great product. It is so easy to .mix and use. Safe for veggies and fruits as well. I also use it for my hpuse plants. I saw the effect the first time I used it. Smell isn't strong, which is a good thing. This is worth the price compared to other fungicides. I like that this came with the cup for easy pour.

Originally posted on bonide

Review 1

Eh okay

2 years ago
Left my plants smelling a little weird for days.. it wasn’t something I wanted. My dad said it did work but the smell wasn’t great. This is not something I’d buy again.i

Originally posted on bonide

Review 1

Work well

2 years ago
My roses have been dealing with mild dew for a while and my mom told me that this has helped with hers in the past. I’m so glad i give this a try. It works efficiently and effectively. Within weeks, my roses have gotten back to normal and a lot more healthier. Now i always have it on hand so that i can use it whenever needed.

Originally posted on bonide

Review 1

Great

2 years ago
I wouldn’t say I’m a professional Gardner but I do enjoy it as a hobby. This stuff came in handy this year as I did get fungus in one of my tomato plants I ended up having to get rid of the plant but fungus can live in the soil and this helped keep my new plant healthy. The packaging is easy and great to store. I also like this is organic farming approved because I try to keep my veggies pure. I would recommend this product. I received as a gift from Influenster for my honest review.

Originally posted on bonide

Review 1

Good and reliable

2 years ago
I received this in return for my honest opinion. I have been using this fungicide for over a year on my lemon and lime trees. It has been effective in preventing and reducing any rotting. I dilute a capful with 2 gallons of water and spray numerous trees. It does leave a dusty blue residue but it wears off eventually.

Originally posted on bonide

Review 1

It work

2 years ago
My rose have some copper on the leave I used liquid copper and mixed with water and spray on the leaves early in the morning and it is very effective. It doesn’t smell so bad when opened the bottle.

Originally posted on bonide

Review 1

Works and last long

2 years ago
I discovered this brand recently and I've been using their deer spray concentrate. Similarly, this fungicide is also concentrated, it's easy to use and mix and it lasts long. I've been fighting fungus on some of my shrubs and this product definitely helps me effectively get rid of it.

Originally posted on bonide