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Why does coco nutes often only have one A B blend, instead of 2 seperate Veg and Bloom blends?

DBQushstarted grow question 3y ago

I personally use Plagron nutes in coco, hence I use the same A+B bottles for veg and flower. When looking at nutes for soil they have the 2 different bottles for veg vs bloom. So my question here is why does it seem like some coco lines(plagron, canna) only have 1 over both?

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