Container gardening is handy if your growing space is limited or if you just want to grow a few things on your deck or patio. The preparation procedure is the same, no matter what size the container. The most important thing to remember, when preparing a large container for the garden, patio or deck, is to place it in its permanent location before starting. It may be too heavy or cumbersome to move after it is planted.
Place the large container in the location where it will reside. Fill the bottom of the container with an inch of stones or gravel. This will keep the potting soil intact, so it doesn't wash away out of the drainage holes at the bottom of the container.
Pour a commercial potting soil over the stones, enough so that the original soil top of the plants will be about an inch from the top of the container. Remove the nursery plants from the original containers.
Set the plants on top of the potting soil in the large pot. Pour additional potting soil between and around the nursery plants. Gently, press on the soil to compact it a bit. This will secure the plants and roots. Add more soil if needed, but never pour additional soil over the top of the original plant soil.
Water the new large planted container until the water drips out the bottom drainage holes. Check the soil often. When it starts to feel dry, give it another watering. It may be necessary to water more often when the climate is warm and dry.