How do you know whether you are severing the rhinzone when you dig them up for the winter?
Certified GKH Gardening Expert
It will feel like a root cracking. Dig around them pretty far out, and shake the dirt off. Digging way past where they are growing will ensure that you do not damage the plant. This article will help: https://www.gardeningknowhow.com/ornamental/bulbs/calla-lily/calla-lily-winter-care.htm