Calla Lilly plants over winter

I wouldn't cut them back at all. I allow all of my lilies to die back and disintegrate into the soil as the weather grows colder, enriching the earth and roots below. If there is any remaining debris when it's time for spring cleanup, I'd gingerly remove it, but it should be minimal. I pretty much allow all of my plants to breakdown by themselves over the winter; they provide winter garden interest, habitat for birds and small animals as well as emergency wildlife food. These plants always seem to return stronger and more vibrant than ever!

Thank you for taking the time to answer my question so thoroughly! I appreciate your interest and sharing!

gail

Calla lilies have beautiful foliage, even when the plants are not in bloom. If the foliage still is green and healthy looking, let it grow as it is adding interest to the garden. Once it begins its decline, or after a killing frost, cut the old foliage off. Bearded iris foliage is evergreen most winters, so leave it alone. Peonies can be cut back as soon as the foliage begins to brown. They start their growing season early, and often go dormant early in the fall. Dig and divide your peonies now if needed. Make sure you replant them shallowly. Iris are best dug and divided six to eight weeks after bloom. Doing so in the fall leaves them little time to re-establish their roots before it gets cold. Bearded iris rhizomes are planted with half of the rhizome or bulb in the ground and half above ground and if they lack a strong root system can get heaved out of the ground during the winter months. For calla lilies, leave them alone until them begin to emerge next spring. They are not reliably winter hardy in the northern tier of the state, so extra mulch is great for added winter hardiness.