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Fertilizing and Watering

Subject:  Copper for Pumpkins

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Date Posted

Suburban Gardener

Western Washington

My local Lowe's carries Bonide Natural Concentrate Copper Fungicide. Is it OK to use this as a copper soil supplement for my kins? If not, which product(s) are people using? Thank you for your input.

4/17/2019 1:07:00 PM

wile coyote

St. Paul, Minnesota

I am using worm casings for my copper, boron, iron, and zinc deficiencies. Never use fungicides or pesticides as an amendment to your soil.

4/17/2019 1:15:18 PM

SD Mike

South Dakota

Copper sulfate will be your best soil amendment and the cheapest.

4/17/2019 1:24:31 PM

wile coyote

St. Paul, Minnesota

Copper sulfate kills roots in sewer pipes/septic tanks and is an algaecide. Do you want to kill your pumpkin roots if you use copper sulfate.

4/17/2019 1:56:36 PM

Suburban Gardener

Western Washington

Isn't there a form of copper that is OK to use on pumpkins? Thanks.

4/17/2019 2:09:59 PM

Suburban Gardener

Western Washington

I'm not finding it anywhere despite my internet searches.

4/17/2019 2:10:28 PM

wile coyote

St. Paul, Minnesota

You can get copper from worm casings. The other elements are a bonus for me. I bought 10 Pounds All Natural Worm Castings by The Seed Supply - Vermicompost Microbes - Earthworm Castings
off of amazon.

4/17/2019 2:26:37 PM


Central PA

Copper sulfate. You won't be putting enough on to kill anything if you follow instructions.

4/17/2019 2:49:18 PM


I see in diaries that it is usually applied in spring with other amendments.
What about copper chelate(sold for hydroponics and soil?
Make sure you check it out properly so you do not kill your plants or poison your soil.

4/17/2019 2:49:48 PM



Here is some advice from a pretty good grower.

4/17/2019 3:02:35 PM


Springfield, VT

Copper sulfate will work but as any of the micro element too much is toxic and will kill plans. Less is better. Typically the dry fungicides are copper sulfate to others are different forms. I would suggest using Bonide's liquid iron it has iron, copper, boron, etc in small amount which can be added during the growing season.

4/17/2019 3:15:33 PM


New England

copper sulfate is very bad for the environment and for plants/roots. Use an organic compound like worm castings, as noted or any of the fertilizers specifically created for plants

4/17/2019 3:28:28 PM

Suburban Gardener

Western Washington

Worm casings look like a good option in many ways, thank you for your input everyone, I appreciate it.

4/17/2019 4:31:01 PM

Don Crews


I use copper sulfate all the time... when my soil test says I need it. Don’t put on anything unless your soil test or tissue test says to. Write that down on a big sign in front of the patch. Live it. Think you have a problem? Test, don’t guess. I used to get so out of range guessing that it took years to get back. Don’t get me wrong it still happens but when it does I know it right away.

4/17/2019 11:52:43 PM


Central Illinois

copper sulfate is what Western Labs recommends to me, any type of copper is deadly if too much is used

4/18/2019 8:33:15 AM

Suburban Gardener

Western Washington

Thank you for posting, I appreciate it.

4/18/2019 12:51:12 PM


Simi valley, ca

My soil test showed a bit low in copper, the amount you apply is not much , Just (something like a cup per 1000 sq ft). But when i foliar feed i will put like 1/16th teaspoon in the mix !!!

7/27/2019 1:41:54 PM

Porkchop(team sLamMer)

Central NY

Not a CUP!!!

7/27/2019 8:02:25 PM

Porkchop(team sLamMer)

Central NY

Great advice as always Don....

7/27/2019 8:02:47 PM

Total Posts: 19 Current Server Time: 6/6/2020 8:33:00 AM
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