Hello, I live in Kalispell, MT (zone 4b I think). I have 3 patio blueberry bushes that I inherited from my mom in Oregon. As our winters tend to be colder here I was hoping to plant my blueberries in a greenhouse but in the ground in effort to protect them from the snow but allow for cold nights. I really don't want to lose these bushes! Do you think they would do okay in the greenhouse? Is there any reason to keep them in pots vs in the ground? Thank you!

If you know the name(s) of your blueberries (like Patriot, Blue Ray, Elliot, Northblue, Chippewa, Northland, Rabbit eye, half-high, low bush, high bush, etc.) it would remove a lot of the mystery and advice based on conjecture.....

It is called Sunshine Blue, southern high-bush, dwarf.

Will there be bees or other insects inside your GH to pollinate the blueberry plants? If so, they would probably do fine planted in the ground as long as it doesn't get too cold for that variety. I have 5 plants in large pots (Northland, a half-high type), which I move into an unheated high tunnel for the winter and then outside during the growing season. My main reason for keeping them in pots is that our soil tends to be alkaline and it seems easier to give them the pH they need by keeping them in pots. Best of luck with growing your blueberry plants!

Emphasizing what @Weedwhacker said: Blueberries need acidic soil. Check your soil pH before deciding to plant them in the ground.

You should also check the pH of your water supply. Alkaline water can ruin the plants as easily as soil. You can acidify the water if needed.