Stump dirt vs. potting soil
I love stump dirt, but my
onion seedlings apparently aren't nearly so keen. I ran a side-by-side
comparison of stump dirt versus store-bought potting soil...and the
latter won by a landslide.
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Despite my disappointment
that the homegrown organic matter failed the test, I can guess the
reasons. Stump dirt does a great job holding moisture and looks like
rich, fluffy ground. However, if the product really is simply beetle castings, I might be seeing the same problem that those who use straight worm castings with seedlings see --- excess salts keep the baby plants from thriving.
Either way, I'll squash
my urges to go entirely homemade and will start my next round of seeds
in store-bought potting soil. After all, the final crop is the goal and
I'll take whatever path I need to in order to achieve that destination.