I just received my blueberry shipment yesterday, and was anxious to plant. I ordered 14 blueberry 2-3 foot tall plants (climax, premier, brightwell, and delight varieties). Blueberries like a little acidity and do very well in the southeast Texas well drained sandy soil. We will put most of the plants in the ground in Livingston, but I wanted to have a couple here in San Antonio in pots.
My blueberry potting mix: Sandy southeast Texas soil, peat moss, worm castings, and finished compost.
For the two plants I split 4 lbs of Texas red worm castings that I placed near the roots, not mixed like the other components. Worm castings are an outstanding fertilizer to support root growth and development.
These plants should produce a few berries early this Summer, but we will pick them early to yeild a better crop in the second year.
I chose a large container, and repurposed an empty syrup tub that we use to feed cows.
Texas Jumpers 
Looks like you’re all set! Can’t wait to see the posts of these growing!
Some people do things fast, without even considering taking their time to enjoy the process. I love the fact that you’ve prepared everything and that you plant the blueberries with a lot of meticulosity