Here’s what you should know and why it matters. Walk down the aisle of any nursery or garden center and you’ll see bag after bag of materials for potted plants or garden beds. But before you heft the ...

The word “vermiculite” is defined in Henry Beard and Roy McKie’s hilarious “A Gardener’s Dictionary” as an “obscure order of nuns devoted to gardening.” In fact, it is a silicate material similar to ...