Do not confuse the excess moisture or liquid collected in the bottom of a worm bin as 'worm tea'. This leachate is the  undigested liquid and excess moisture that has passed through organic material that may contain pathogens or excess nutrients that may be harmful to plants. It is best to use this leachate on unwanted plants such as weeds.

information supplied in VERMICULTURE TECHNOLOGY, 2011.  page 70

Rhonda L Sherman, North Carolina State University