Compost...if you dont have your own get a bag of it. Mix it into the soil.
Peat Moss mixed in, may be too late, helps to hold the water and feed the plants slowly.
Growing a garden in Calgary? Sucker for punishment?
The Blueberries will die for sure...too cold in the winter. Try Raspberries instead but keep ahold of the growth or they will go wild.
If the plant is wimpy maybe you have watered it too much? Let it dry out a bit if you find the soil is moist below the surface. It helps the roots grow stronger.
A Garden in Calgary? Serious?
Wait for the first hail storm then run out and protect your plants before they become salad for the rabbits!