Most Calla species are not hardy. You need to prepare such varieties for the cold season in good time.
The Calla or Zantedeschia is a flowering plant that you can keep indoors or put in a bucket or in the garden during the summer months.
With a few exceptions, callas are not hardy. There are several measures for the cold season. Depending on whether you have a container plant or the calla grows outdoors.
➜ Preparing calla for winter
Calla outdoors
After flowering, remove all dead plant parts. From now on you should also stop watering.
In late autumn, dig up the entire plant and free the roots of debris. This works best if you let the tubers dry for a few days and then shake them out vigorously. During the winter, store the tubers in a box in a dark and cool place, for example in the basement. Alternatively, you can put the plant in a pot with normal soil and overwinter indoors. Water very little during the winter months and keep the pot in a cool room. Hardy varieties remain in the garden, but are well covered. Straw, leaves, brushwood or fleece are suitable for this.
» Calla in pot
Here too, cut off wilted parts of the plant. Smaller buckets go into a bright, cool room. If you don't have space inside the house, in the greenhouse, conservatory or garage, the container plant can also stay outside. Push the pot against a protective house wall and attach good winter protection, for example bubble wrap, a jute bag with straw filling or similar. A thick styrofoam plate under the pot helps against cold ground.
Tip: You can also buy special fleece to protect potted plants in winter:
» Calla as a houseplant
All faded and withered parts are removed from the plant. Place the pot in a bright, cool spot and water little to no water during the winter months. A temperature between 10 and 15 degrees is optimal (can be easily and consistently controlled via a room thermostat or Smart Homeregulate the thermostat), and the plants need light. Also cut off any parts of the plant that wither in winter to prevent mold from forming.
➜ Ready for next spring
Place overwintered tubers in normal potting soil from February/March. Water carefully and wait for budding - this usually takes a few weeks. Slowly acclimate the plant to warmer temperatures. A sudden change from cold to warm will damage the calla lily. You can put the calla outdoors from May.
For potted plants and indoor callas, spring is the right time to repot. When you do, remove dead roots. Callas in the tub can go outside when there is no longer a threat of frost - please make sure you switch over slowly here too so that the plant does not get a heat shock.