Q.My Pomegrenate Seedling Isn\’t Doing Well
Hello, I planted a pomegrenate seed and it was growing well, but recently the leaves started going yellow and tiny. I water it once a week and it stays all day in the sun.

Certified GKH Gardening Expert
It appears to be in a seed starting mix, with very little nutrients. I would get that into some potting soil mixed with compost.
Here is an article that will help you to grow them in container:
https://www.gardeningknowhow.com/edible/fruits/pomegranate/pomegranate-in-a-pot.htm