I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
If the soil has pulled away from the sides of the pot this can cause excessive runoff. Also some planting mixes are just too loose. You can repot the plant in a mix that holds moisture better if it comes down to this. Otherwise I'd leave it be and try to keep the soil evenly moist which should help reduce the problems a lot.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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