Soil Amendments

Worm Castings

kamclain38 added on March 24, 2018 | Answered

I have been reading about worm castings and have a question you might know the answer to. Most all the articles I’ve read have talked about mixing the castings with soil to a particular ratio. My question to you is can I grow plants in nothing but worm castings? Or is it best used with soil?

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Certified GKH Gardening Expert
Answered on March 25, 2018

There are a lot of things that worm castings will not provide for plants. This is just a small part of a healthy soil mix. The plants will not last long in just worm castings alone. This should be mixed with a soil, or mixed in as part of a soilless mixture.

I have, actually, attempted this myself long ago. Unfortunately, it will not work. They are a VERY beneficial amendment to soil, however.

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