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Worm tea more properly called Vermi-liquid is not a fertilizer but all the micros than make a plant capable of absorbing nutrition.
Plants are capable of taking nutrients from their environment with only worm tea. It is used without other fertilizers for growing food in third world countries where fertilizer is very expensive and it works well.
There is an entire village in Guatemala growing a coffee plantation with only worm tea.
It can be used with chemical fertilizers on orchids but not necessary. Phosphorous kills beneficial microbes in all growing mediums. I find the large number of microbes I add with worm tea leaves plenty for the plant when I also use slow release fertilizer pellets.
Worm castings (worm manure) is a fertilizer the same as cow manure but worm manure is totally organic whereas cow manure can have growth steroids and antibiotics that were feed to the cows.
Vermi-liquid has ceitanese in it which dissolves ceitain. Since the skeleton of an insect is ceitain it works as an organic pesticide. Ceitanese is harmless to humans and pets.
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jerry
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