My alocasia was super happy indoors in the winter. I took it out starting from April. It is in full sun for 3 hours a day and then shade or semi shade. Can't see any pests. I fertilise every 3 weeks and I gave iron too. However leaves turn yellow, crispy and then holes develop. And it's not even the oldest leaf. Could it be the sun? Temperatures here have reached a maximum of 83 F so far.
