So... I have an avocado tree coming up in my compost pile. Is there any way to keep it alive in MD without putting much effort into it? What are the chances it keeps going, even if suboptimally?
Outdoors, all year round? No, and none. Full stop. Avocados are subtropical. A mature tree can survive a brief, light frost, but anything much colder than that will just flat out kill them, and a young one won't have a chance..
Mid-Fall through early Spring indoors, even with 56F? Sure, but not with poor lighting. Unless "suboptimally" includes letting it try to send a spindly trunk up to your ceiling reaching for whatever light there might be, and having to hack it way back every year... And they look hideous when you do that, so there's really no point to it at all.