I prune in the spring, while the plant is still dormant.

On my brand new plants, I don't "prune" to prevent fruit, I actually go around and nip off all the flowers. Removing the flowers is how you prevent fruit.

Pruning is to shape the plant, keep it the size you want, and to renew the fruiting wood. I'd remove the flowers this year and let the plant set fruit next year. Fruit is removed when the plant is first planted so that the plant can put more energy into a root system the first year.

Your climate is much different than mine. I can't even imagine getting blueberries in Southern California, so if you get conflicting advice from someone who is more local to you, they probably know better than I do how to treat a blueberry in your area.

This time of year, that has to be a potted plant that you bought, so I suggest that you plant it and not try to prune it until next spring. Do remove any flowers or fruit this year.

This is not the right time of year for planting a blueberry shrub. I suggest that you keep it in the pot, in a location that gets some sunshine for 1/2 the day. Full sun all day is likely too much sun for a recently purchased potted blueberry shrub. The shrub could be planted around October 1, when the hours of daylight are reduced. You might have native soil with pH on the alkaline side of the scale. I would get the soil tested before transplanting the blueberry shrub, if I were in your situation.

Thanks both for the info.

Remy