It's also recommended that you wear gloves when using, it should be safe as everything is heat treated / sterilised but as it is blood and bone its just an extra precaution.
"You don't stop gardening because you get old, you get old because you stop gardening." - The Hampshire Hog
Just be careful. I use a hand cultivator that spreads FBB around my plants. This scapes the top surface of soil. The main thing is to water in FBB around the plant so that it sinks in to the roots so it’s works quicker
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"You don't stop gardening because you get old, you get old because you stop gardening." - The Hampshire Hog