Advantages are not always advantages, disadvantages are not always disadvantages!
There are both pros and cons to everything and re-using your microgreens potting mix to grow more is no exception.
If you’re willing to sift out all the rootlets, re-using soil is absolutely marvelous.
We grow our microgreens in the organic potting mix we use for all of our seedlings — it’s light enough for seeds to germinate quickly and nutrient-dense with compost and worm castings, bringing out the flavors of each variety and helping them be as tender as possible. Fruition’s Microgreens Made Easy Collection has all the things you’ll need to start growing microgreens, including 20 quarts of our organic potting mix.