Olympia Blueberry

How tall does this blueberry bush get?

Olympia has a mature height of roughly 5 feet tall.

Just picked ours up this morning and I’d like to know what planting width it prefers. We have plenty of room to let them spread, my first thought is 4 feet apart.

Plant at 4 foot centers if you want them to touch, 5-6 foot centers if you don't want them to touch.

Will this blueberry grow well in a large pot - 22in wide x 20in deep?

With irrigation, yes it will grow fine.

Since my backyard is not big, if 1) I just plant one Olympia Blueberry, wit it bear fruit? 2) how long will it take to bear fruit? 3) should I plant blueberry now or in Spring? Hope to hear from you soon.

Olympia performs very poorly on it's own. It will produce fruit, but in very small amounts. Our blueberries are flowering age when shipped and can be planted anytime.