Elephant Ear in a container

Elephant Ear in a container

I have a lot of elephant ear plants growing in my yard. The very large ones are big enough that the yard guys don't mow them down, but the smaller ones are often cut (we are renters.) So, the other day, I dug up one of the medium-sized plants, one which often gets cut, and put it in a planter box. The soil in the planter is pretty good- it was originally a potting mix with added gravel, but earthworms added to the box have made the soil much more moist and crumbly; a lot of worm castings are evident. When I transplanted the elephant ear, I also transplanted a small taro that was growing on the other side of the house, into the same box. I watered both with fish emulsion. I am keeping the planter near where the elephant ear was originally growing, so it will have largely the same light conditions. Since the transplant, the elephant ear's leaves have yellowed a bit. I can't tell if this is normal leaf-drop or if something is wrong. A new leaf appears to be emerging. Has anyone here grown elephant ears in containers? I know I should keep it very moist, and that it is a heavy feeder, but what else do I need to know to keep it alive? I would like to give this plant a chance to become large.
Hoya help

Hoya help

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One more question…

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