Gene the Soil Whisperer and Mr. G the Fasilities Specialist taught me something new. When it comes to trees (or plants I guess) and rock rings built around them, it's best to build them at least out to match the canopy of the tree. I have been instructing students to build rings two feet out, maybe, from the trunk of the tree. In biological reality, rings should be at least out another two feet so that if drips were falling from leaves, they would fall on the mulch inside the ring.
Rock rings are invaluable on our campus, to hold in mulch and moisture and keep out pigs, balls, and froliking children.
Come to find out, the roots of the tree grow under the ground at least as far as the canopy extends. These fine feeler roots sponge up nutrients and moisture from the soil for the entire tree. The larger tap roots are found underground closer to the trunk and lend more stability than nutrient-sucking abilities. Fertilizer should also be spread out where feeler roots can find it. An expanded rock ring or a rock ring to encompass and entire area produces more microbes and allows more nutrients to get to the right plant places than mini-rings.
Thanks Soil Whisper and Mr. G.
Krista Joan says:
My mission is to teach, train, and testify in resistance to the white supremacy of my ancestors. My personal choices are political, powerful, and practical. Let's trash waste.