Sorry for this un-researched and not-terribly-thought-out post, but...
I inherited a large (6-7 foot tall) orange tree (supposedly) from a relative. It's in a large pot (maybe 20 gallon?). The previous owner would keep it outside in the summer and just indoors (garage) in the winter. This is in Zone 7b. The tree was purportedly started from seed from a grocery store fruit.
My questions:
1) Assuming it's a run of the mill Orange tree from a grocery store seed, will it EVER produce fruit?
2) Assuming it's capable of producing fruit, can it do so by spending summers outside and winters inside but with no supplemental light, humidity, etc?