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some kind of nutrient issue?

Posted by weirdflowers 5 (My Page) on
Thu, May 1, 14 at 20:40

So I recently got a free bag of Growstone Coco Mix from the dude at the local hydroponics store, who said he wanted to know what I thought of it. I put a few peppers in it and now they're showing some splotchy chlorosis as you can see in the picture. None of the peppers in my usual mix show any problems right now. Plants in both mixes are being fertilized the same.

My thoughts are a nutrient availability issue due to differences in either substrate pH or water retention. Any ideas?


Follow-Up Postings:

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RE: some kind of nutrient issue?

Undersides of leaves look fine? If so, I'd go with lack of Magnesium. Try giving about 1/2 tsp per gallon next time you fertilize.

Let's see what others may have to say.

Kevin

This post was edited by woohooman on Fri, May 2, 14 at 0:45


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RE: some kind of nutrient issue?

Odd pattern. Try what Kevin mentioned - Epsom Salt. You should see a difference in just a few days. If the yellowing continues, it could be too much moisture in the root-zone, lack of nitrogen, et cetera.

What exactly is your fertilizer?

Josh


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RE: some kind of nutrient issue?

Same opinions as Kevin.

Sometimes Magnesium is already in the soil but not available to the plant; I have read an article that suggested foliar spraying Epsom Salt ( 1 TB spoon per gallon of luke warm water).
It is also a QUICKer dose than applying ES into soil.


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RE: some kind of nutrient issue?

Check the Ph first.


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RE: some kind of nutrient issue?

Woohooman, if you're referring to pests damaging the leaves, I haven't seen any.

There's Osmocote Plus in the mix and they get Foliage Pro at about 1/4 strength.

pH is about 6.5.

I'm going to try an Epsom salt spray and see if that does anything.


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RE: some kind of nutrient issue?

Increase the Foliage Pro to half-strength, or more.

Josh


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RE: some kind of nutrient issue?

weirdflowers: No. I was referring possibly to edema. Seems to be more common lately. google a pic of pepper edema and you'll see what it looks like.

I'm sticking with the Mg theory. I'd do as Josh suggested. The Foliage Pro has Mg in it. Last year, a couple of mine looked similar---Josh suggested upping the ferts(Miracle Gro = no Mg) and epsoms(Mg)...voila!

Kevin


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RE: some kind of nutrient issue?

Ahh yeah, I've seen edema on some of my peppers in the past, but it never seemed to be associated with any kind of nutrient issue before. It looks like a couple of these plants do have it.

Does that change anyone's advice?

This post was edited by weirdflowers on Sat, May 3, 14 at 16:38


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RE: some kind of nutrient issue?

Edema usually means overwatering. Not always, but usually. So, along with the above advice, let the soil dry out between waterings.

Soil almost bone dry, water thoroughly. Let dry out again, water thoroughly. And so on.

Kevin


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RE: some kind of nutrient issue?

Do a search on growing in coir, advice from peat/soil growers is going to kill your plants :)

Letting coir go bone dry is going to skyrocket the substrate pH, the only time you do a wet/dry cycle is while establishing roots.


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