What is the most reliable method for determining if a wild plant is edible onion or garlic?
Answer
Crushing a leaf to check for a distinct onion or garlic scent
The most reliable method for identification relies entirely on the olfactory cue; if crushing a leaf or the plant base does not produce a distinct onion or garlic smell, the plant should be considered inedible.

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Using wild onions and garlic from the lawn - YouTube
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