Home > categories > Minerals & Metallurgy > Vermiculite > What is the gold/bronze-colored stuff on top of plants in plug sheets?
Question:

What is the gold/bronze-colored stuff on top of plants in plug sheets?

I work in a greenhouse and have always wondered about that. It looks like little gold flakes.

Answer:

perlite and vermiculite. Also the sand or rocks at the bottom would make good drainage.

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