Making worm compost tea

You can mix the worm castings from your bin with water to make a liquid fertilizer. This compost tea is an excellent fertilizer for both outdoor and indoor plants. It can also be sprayed on foliage to ward off insects and disease.

One common misconception is that liquid that drains from your compost bin is “tea”. This drained liquid is actually called “leachate” and should be used as a fertilizer with caution. If it comes from a mature worm bin, it is probably a fine fertilizer, but if your bin still has some uncomposted material or anaerobic areas, the leachate could contain unstable compounds that could harm your plants. If in doubt, use leachate on less sensitive areas of your garden.

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