Sorry for the "Bach" ground. This is my sanderianum and the roots are super healthy and everywhere in the pot: not super dense but numerous. The roots are super fine compared to roths. I have been keeping it in about a 1.5 inches of water and it seems to enjoy it. I hope it blooms in the next year or two. Sam Tsui said this was his best cross available for sanderianum at the time for color. When I does bloom I think it will have a lot of energy to put into the flowers and I will crank up the humidity.