Probably not gonna happen.
If i know SE and can read what in the past history they have done. It will be a shared progress instanced area like the fairies area. You'll do daily quest to make progress to upgrade the zone and you'll open a new vendor. The quest might be farming related and you'll have to buy specific seeds just for that area or do watering or hoeing ext. But won't effect housing area farming(current gardening) in any way.