To use a container in your container garden you must be sure that it has enough drainage, is clean, pest free, and disease free. It also needs to be in good condition so that it will last longer. Whether you use planters, buckets, or a metal wash tub for your plants the following tips should be beneficial to you.
Clean Your Container:
If your container has been used in the past whether for planting or other things, you will want to be sure that you wash the container with a mild detergent. While washing your container checked for any damaged areas that may need to be fixed. Cracks can give way to the pressure of a plant's roots against them resulting in a broken container during the growing season. If the container cannot be fixed you may want to discard it in lieu of another one.
Container grown plants have trouble if they do not have adequate drainage. The excess water can cause your plants to become water logged and this will make them sick or even kill them. You will need to have holes at the base of your container for excess water to be able to escape. If your chosen container does not come with holes already in it, then you will need to carefully drill some. To keep the holes from being clogged you will want to add gravel to the bottom of your container, 1-2" should suffice.
If your plant is on a surface that needs to be protected from water, then you will want to have a drip tray beneath it to catch the excess water that will come out.