General Hydroponics Diamond Black 0-0-1

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18.50 15.80 15.8 USD

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- Derived from 100% pure mined Leonardite
- Contains an exceptionally high percentage of plant-active humates
- Supports beneficial microbial activity in soils
- Increases micronutrient availability
- Can be added to all kinds of garden soils and potting mixes
- Can be used during all phases of plant growth


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