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PostPosted: Aug 23rd, '14, 06:18 
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My PH is staying right around 7.4...down from 7.6 a year ago. It looks like I need to supplement, but not sure what to use that won't raise my PH even higher. Any suggestions? This would be so easy in a dirt garden. SuperPhosphate- 0-45-0 and done.


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PostPosted: Aug 23rd, '14, 07:08 
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What is your phosphorus reading? I still believe phosphorus is the most abundant mineral found in AP and find it odd that systems have deficiencies there. But in answer to your question Id go for a foliar feed of M.P.K

There are a bunch of threads with discussion about phosphorus.

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PostPosted: Aug 23rd, '14, 07:30 
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I think he meant to say N.P.K. typos are a hell of a ting.

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PostPosted: Aug 23rd, '14, 07:34 
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Not sure...in the process of ordering a test kit for P. Just looking at my plants and descriptions/photos, that's what it looks like. What is MPK? Do you mean N.P.K.? as in Nitrogen, Phosphorus, and Potassium?


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PostPosted: Aug 23rd, '14, 07:36 
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I don't know of any organic complete fertilizers that are high in P. My background is commercial horticulture...this organic and fish safe stuff is all new to me.


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PostPosted: Aug 23rd, '14, 07:41 
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MonoPotassium Phosphate (MPK)

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PostPosted: Aug 23rd, '14, 08:07 
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What charlie said. I use MKP (MonoPotassium Phosphate). Gives a bit of a potassium boost as well, which is almost always needed.

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PostPosted: Aug 23rd, '14, 08:11 
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Whoops, yes sorry I had the K and the P around the wrong way. Thanks Matty.

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PostPosted: Aug 23rd, '14, 10:43 
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I use Blood and Bone in my system, I've posted the analysis before, probably in my thread and maybe another about P supplementation as well.

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PostPosted: Aug 23rd, '14, 16:52 
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oh thanks for clearing the up... is that similar to T.S.P....?

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