You can bury your plant up to the first node without any problems.. i have only 4 feet to work with not counting the containers and light.
Here is a link with information on transplanting and burying.
Good luck!
evertking Reviewed by evertking on . Recycling Plant water What would happen if I diluted and reused the water that my soil didn't absorb. It seems to me that some of the nutrients fromthe soil mix would be in there.:D Rating: 5