On one of your growing know how, the phase harden off ears plants for a week prior to placing outside. What does this mean?
Elephant Ears Bulbs
If you sprout your elephant ear bulbs indoors to get a jump on the season, the plant must be acclimated to outdoor conditions slowly. This is true of all plants taken outside. It takes about a week of slowly increasing the amount of time outdoors, starting in a shady spot and moving to progressively more sun and wind. If you are planting bulbs outside, hardening off isn't necessary.