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Home Brew Forums > Home Brewing Beer > Hops Growing > nutrient deficiency?
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Old 06-24-2010, 04:58 PM   #1
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Default nutrient deficiency?

So I think I'm finally making some headway with the massive spider mite infestation I've had with my hop plants, but now I've run into another issue. Lots of the leaves have been lightly or heavily damaged by the spider mites, but when I went out to check on the plants yesterday I noticed that even the leaves that were healthy are starting to yellow around the veins of the leaves. Other leaves are starting to brown, but I think these are mostly the ones that the spider mites hit hardest.

I managed to snag a camera from work, so I actually have pics. What can I do with these plants to get them healthy again?


This is one of the previously healthy leaves.


A lot of leaves are starting to look like this.


You can see here that the spider mite infestation is still not 100% under control. That spec in the center is one of the bugs, and you can see the webbing underneath the leaf on the left side.


Here's the plant as a whole.

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Old 06-25-2010, 12:20 AM   #2
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Looks like you need to fertilize a little. Don't go overboard though as you can hurt the plant by overfertilizing.

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Old 06-25-2010, 12:20 AM   #3
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Since this morning the plants are in even worse shape somehow. The majority of the leaves that were half-browned have completely turned brown and whithered. I found spider mites all over them though, so I'm assuming that's the reason. I sprayed them down again, seems like I have to hit them every chance I get. Still anyone have any idea why the leaves are yellowing? I'm getting worried that the plants are dying.

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Old 06-25-2010, 12:25 AM   #4
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It kind of looks like potassium deficiency to me as pictured here:

http://www.freshops.com/hop-growing/...ases-and-pests

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Old 06-25-2010, 12:41 AM   #5
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Thanks guys, I guess I'll have to pick up some fertilizer right away. Potassium does sound reasonable since the leaves do seem to be curling downward. Between this and the mites I hope my hops still have a chance.

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Old 06-25-2010, 12:50 AM   #6
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Are the leaves pretty thin? Was just check the Homebrewers Garden and Zinc deficiency was described as "Leaves roll, followed by bronzing and browning; leaves abnormally thin."

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Old 06-25-2010, 01:26 AM   #7
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Do a foliar with N Zn And B get as much N into the ground as possible If u have any apple trees around u go cut some suckers off them they have a trip mite that is predatory to spider mites stick a couple of suckers in the groung touching your plants Cheers Glen

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Old 06-25-2010, 01:31 AM   #8
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It's hard to tell since this is my first time growing hops. I really don't have anything to compare to. They don't feel particularly thin to me. The one thing is looking at zinc deficiencies I'm seeing that the leaves would be small, which they don't seem to be. I'm thinking most of the browning so far has been a result of the mites? Anyway I guess I'll hit it with some flower fertilizer and keep spraying the mites and see if it gets any better soon.

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Old 06-25-2010, 01:37 AM   #9
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Hopfarmer - thanks for the advice, I had to look up what foliar feeding is. Unfortunately I don't have any apple trees (or trees at all, I'm a condo dweller), but I'm going to see if I can capture some ladybugs from my parents house tomorrow. My sister works for a garden center so hopefully she'll be able to help out with getting the right fertilizer.

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Old 06-27-2010, 12:38 PM   #10
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You might find this site useful: http://www.arbico-organics.com/categ...tors-parasites They have ladybugs & predatory mites.
Regards, GF.

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