GK,

I think Agaves and their relatives, like the Manfredas, don't stop growing, although they may slow down a lot during a particular season, throughout the year. Your plant is growing, as it does shedding older (lower) leaves. I'd repot it - it will grow given sun and warmth during the winter - my Mangave 'Bloodspot' does, as do the other Agaves, although at a reduced pace.

I grow several types of manfredas and they freeze back in the winter here in Zone 8b and grow again in the spring. Also they get eaten to the ground by deer and pop right up again.I have to hide the manfredas by thorny and spiky plants. Manfreda maculosa and M. seleri are native to areas close to me. When I googled Manfreda chocolat chips , Plant delights says it has "winter deciduous rosettes" and has it hardy to Z7-8. I do not know how they woiuld react growing inside since I have never had them inside in a northern clime. It is on my want list but then I remember all that high priced deer food that I have already bought. Deer really love M. mocha macho.I tried 3 times at $7 and $15 a dish, I mean pot. They seem to leave the M. bloodspot alone though so far. That one is not deciduous. It is more like its agave parent in that regard.