Select an appropriate container for the type of berry plant that you are growing. Plants that grow into large shrubs need large planters. Strawberries will grow well in strawberry jars.
Cut a window screen so that it is slightly larger than the drainage hole in the bottom of the terra cotta container. Fit the screen over the drainage hole.
Mix a lightweight container soil that is made of 1 part compost, 1 part peat moss and 1 part vermiculite. Fill the container one-third of the way with the soil.
Place the root ball of your berry plant into the container. Fill in the space around the sides of the container with soil up to the top of the root ball. Leave 1 inch of space between the top of the soil and the top of the container to collect water when you water the plant.
Cut a length of PVC pipe so that it is slightly longer than a strawberry jar's height. Drill 1/4-inch holes spaced 1 inch apart across the pipe.
Stand the pipe on its end inside a strawberry jar. Place a cardboard tube outside of the PVC pipe. Fill in the space between the pipe and the tube with pea gravel.
Pack the potting soil mix between the cardboard tube and the wall of the strawberry jar up to the first row of holes in the side of the jar. Place the root ball of a strawberry plant inside each hole.
Pack soil into the jar covering the first layer of strawberries until the first root ball is covered. Cover the root balls with soil up to the second windows. Continue to fill the jar with strawberry plants and soil in this way until the jar is filled.
Remove the cardboard tube by pulling it straight out of the hole. The gravel will keep soil from entering the tube and clogging it.