TwistItUp, somehow I missed your last two replies until today, so sorry for the delayed response. I certainly appreciate the advice.
As an update; I removed as much of the old medium as possible, and cleaned the roots with a very dilute H2O2 solution. I then transplanted into a different planter. Unfortunately, I had to stick with the vermiculite medium (no peat moss), because it's what I had on hand. This is a secret garden that my wife does not know of. She handles our finances, and justifying the purchase of a different medium would be difficult at this time of year. To (hopefully) mitigate the water retention issues I was previously having I added a ton of holes to the planter, and will not water until the plant shows signs of being under-watered.
I lost about 1/3 of my leaves, and the plant looked pretty scraggly to begin with. There were several obvious issues with my grow. For example I did not plant the seedling until almost October, my medium was a poor choice, my 1 gallon planter was too small, I over-watered, poor genetics (bagseed), etc. Suffice to say, I don't expect a very great yield, but it does look like she's going to pull through.
After winter I'll try again. It will be much easier to explain why I need to buy worm castings, soil, and the like. I'd like to try subcools super soil out, but don't really care to make a metric ton of it. I think it would be wise for me to work on my own deficiencies as a gardener before investing so much in supplies.
I do have a couple of clones, and seedlings vegging under a CFL, but don't think I'll be able to keep them there all winter. The area I have dedicated to growing indoors is far too small to really do anything more than rooting clones, and the light is just pathetic. I'll have a much better run when it warms up, and I can rely on the sun.