In your zone, you can expect a full winter dieback. In which case, you will lose any breba crop. Needs full sun (8+ hrs) during the growing season for best fruit production and will benefit from the reflected heat of a south facing wall or other flat surface. This could reduce winter cold damage/dieback.

I have never heard anything about roots needing to be restricted. Figs are fully ground hardy here (the 'Olympian' was developed just a few miles from me) and they grow completely unrestrained in the ground.

How old/large is the fig tree you just purchased?

Regardless this time of year is not the time to plant fig trees outside. In your zone its the time to make sure all your figs are is winter protected for the fast coming winter.

I understand Olympian is a breba producer and if any main crop figs they will be very late. So practically Olympian is only good for brebas in your zone.

Trees that mainly produce brebas need to be fully protected for winter or better grown in pots.

I chose the largest one, it's about 16" tall (was pruned down to that prior to being sold) and the main stem is about 1/2" thick. Got it for $3 at the end of year clearance. I don't know anything about a fig but am making a small edibles garden and want a lot of various species.

It has stayed warm later than it should naturally the last few years here, flowers bloomed in January the last two years... a few just didn't go dormant and the lamia was confused and thought it was spring. The pumpkins only got leaf damage from a frost yesterday and it got hot again today. Peaches are lush and green.

I could build it a small stone area, or place it close to compost to do a microclimate. Its short and I could possibly build it a tiny greenhouse to get through this winter. If you have to pot it up do you treat it as a houseplant? Do they go dormant indoors?

You got a great deal!

Personnally I don't plant my figs in ground until they are mature >3 years old. Also I make sure I have a backup bc anything can happen outdoors. Many critters like the taste of fig wood during winter.

What zone are you in? I thought Ohio was cooler weather similar to Niagara Falls.

If you have a cool place in your house (cold room, garage) temps above freezing, The fig can sleep until spring. Check on it once in a while and make sure it doesn't dry out.

Restricting the roots can help your fig produce earlier. If the roots are allowed to grow unrestrained, the tree focuses on vegetative growth first, then fruit production. In any case, that is the theory. In the right circumstances, I've seen many reports of fig cuttings producing fruit the first year when potted (and probably some do likewise in the ground....)

I would follow Greg & Pino's advice and leave it in a pot the first couple of years. Lots of advice out there on how to overwinter in a garage.

Is this one probably 2 years? I'm in zone 6 just where the glacier stopped. It is warmer than the rest of Ohio, but it also should be much cooler now, it just gets warmer each year and scary the last few. Like we have to run air conditioning up to winter. The temps jerk up and down rather than a steady decline now. I've only been gardening 4 or 5 years but I know the conditions don't sound like they have in the past.