I've had this plant for somewhere between 5 and 8 years and it's gotten long in the tooth (aka the growing point is quite high...feet from the soil) and it's gotten slower and slower to get going in the spring when it warms.

Can I cut it like a potato tuber and rejuvenate it into a smaller plant(s)? The dog pushed it over and the plant is out of the dirt (and basically dormant and leafless anyway). If I can't cut it, how about planting it horizontally, will it likely break buds and produce smaller offsets? I believe it has naturally produced a few offsets, but not many over the years. I'm uncertain at this moment if the offsets are still in the soil or on the mother plant stem.

I really haven't grown many tropical arums so...I really don't know what I'm doing (other than like philodendron which being a vine...is rather different).