Could it be possible you didn't plant deep enough.I've made this mistake before and realized i had a root almost on top of the soil or on the top,Try this add more soil around the base of the plant and in the pot in general almost to the brim it will sink when watered anyway.Remember roots don't like lights and exposure to light will cause a huge decrease in growth and a big increase in root damage. So just add more soil,water,then sprinkle a lil more soil on and come back in a few day to thank me lol