That's one of my favorites. Colocasia will sometimes go dormant this time of year even down South, but definitely sometimes will up here. I'd stop watering it if possible (unless its in the ground then we can't LOL) and separate in Spring. I keep come containers of colocasias out in the front in the summer and they always start shrinking around now. I take them and put them in a corner of the greenhouse and leave them there until Spring
