There is a lot of discussion going on about the question which is better: carboy-aging or bottle aging.
Now I always need my carboys for new wines so I bottle as soon as is possible (fermentation done and stabilised).
My beet wine was made in may this year.
In august I bottled it and the earthly taste was overwhelming present
In october I opened a mini test bottle (I always bottle at least 10 pieces of 25cl mini bottles for testing purposes) the earthly taste was fading. I have not tried it since then, and put the wine far away in my cellar.
There are not many recipes for beet-wine on the net around. But the ones I did find told to age the wine for at least a year, preferably two. And that the earthly taste will fade away and you will be surprised with a wonderfull wine.
So I took this risk and tried it.
The moral is that I do think that this wine will age faster in bottles as in a carboy. But that is just my experience.
If you do not have any need for the carboy, leave it in there. Otherwise bottle it, and age it in the bottles.
Luc