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Organic Potassium fertilizers

Supercharge Your Crops With Organic Potassium!

Organic farmers and gardeners: get your premium potassium-rich fertilizers from Custom Hydro! Our wide selection includes kelp meal, seaweed extract, potassium sulfate, langbeinite and potassium humates, perfect for nourishing your crops.

Featured Products

Organic Kelp Meal Fertilizer 50 lb.
(0)
Organic Kelp Meal Fertilizer 50 lb.
$99.35
In Stock.
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Kelpak liquid seaweed concentrate - 2.5 gal
(0)
Kelpak liquid seaweed concentrate - 2.5 gal
$115.31
In Stock.
Add to Cart

Products [19]

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Sul-Po-Mag standard mini-granule 50 lb.
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Sul-Po-Mag standard mini-granule 50 lb.
$41.25
In Stock.
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Soluble Seaweed Fertilizer 0-0-14, 1 lb.
(0)
Soluble Seaweed Fertilizer 0-0-14, 1 lb.
$10.80
In Stock.
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Soluble Seaweed Fertilizer 0-0-14, 4 lb.
(0)
Soluble Seaweed Fertilizer 0-0-14, 4 lb.
$37.80
In Stock.
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Soluble Seaweed Fertilizer 0-0-14, 20 lb.
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Soluble Seaweed Fertilizer 0-0-14, 20 lb.
$143.40
In Stock.
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Soluble Seaweed 0-0-14 fertilizer 50 lb.
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Soluble Seaweed 0-0-14 fertilizer 50 lb.
$335.23
In Stock.
Add to Cart
Soluble Humic Acid 1 lb.
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Soluble Humic Acid 1 lb.
$12.00
In Stock.
Add to Cart
Soluble Humic Acid 4 lb.
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Soluble Humic Acid 4 lb.
$27.50
In Stock.
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Soluble Humic Acid 20 lb.
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Soluble Humic Acid 20 lb.
$105.50
In Stock.
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Ferti-Organic Soluble Humic Acid 50 lb.
(0)
Ferti-Organic Soluble Humic Acid 50 lb.
$201.46
In Stock.
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