Q.I just received the Oxalis Regnellii bulbs I ordered, but learned that summer is normally a dormant period for this plant; should I
wait until fall to plant? But I learned that summer is a dormant period for this plant. Should I wait until fall to plant? It is now mid-summer in Tennessee.

Certified GKH Gardening Expert
Yes, I would definitely wait to plant these. The plant will stay in hiding from the summer heat, but will be better suited for Fall or Spring plantings. I recommend Spring plantings over Fall, but they will usually do fine if planted in early fall. (Hard to say when Fall will come and stick around with Tennessee weather isn't it?)
This article will help you with the general care of oxalis: https://www.gardeningknowhow.com/houseplants/shamrock/caring-oxalis-plants-outside.htm