Magnum is a concentrated Magnesium supplement with vitamin B1 for supplying extra Magnesium and Sulfur during the Bloom phase.
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Place Categories: Humboldt Countys Own and Nutrient Additives.
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Dayle Thomas, Mar 20, 2013 - Humboldt County’s Own – Magnum
5/5
I love this product, half of me just bought it because of that Humboldt Forrest Gnome looking thing on the front but it works very well. I apply 5ML to a gallon of water when the leaves on my plant start to yellow and within a week of feeding they’re back to green!
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