Non-organic potatoes may be sprayed with a chemical to inhibit sprouting in storage BEFORE they are harvested! Yep, the green plants are sprayed so the tubers won't sprout easily, months later. Once they are in storage, there's a risk that they will be further treated to inhibit sprouting.
All that "inhibiting" means that you may have problems using them as seed potatoes. A guy on a gardening show the other day said that a potato will grow more potatoes if it is planted. I thought that it was just real misleading to have said that . . .
The fresh herb section should be able to provide
starts for rooting. I've only done that with lemon grass because I've got lots of culinary herbs already out in the garden. Lemon grass cannot take a frost and I haven't tried protecting it thru the winter like I do with the rosemary and lemon verbena. It's kind of ornamental growing beside the back steps

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Steve