I have doubts about the Ginseng plant because it is a kind of root. So I have decided to ask you the question: can the earthworms eat the roots of the Ginseng plants?
It is safe for them to eat and can be added to their bin if you are vermicomposting. Additionally, The worms will not hurt the roots at all. Worms eat dead material and are great for aerating soil and adding nutrients.
I have a ficus ginseng I rescued from a friend. I re-potted the plant and did its first watering with rain water. It took about a week for the top 2-3 inches of soil to dry, and I am at my second watering on Sunday, but the top of the soil is still wet. I only watered until water drained from the bottom. The temp here has dropped from high 80's to mid 60's and the plant is indoors. How do I know if the soil is not draining or drying fast enough? Is a week too long for the soil to dry out? Thank you.
The roots system is extensive and they are holding a lot of water in those thick roots.
It may take a week or even longer for the plant to need moisture between watering.
Don't worry about a schedule, just check the soil as you indicate and only then add water.
Your plant looks healthy and happy.