What comes first? This question is as old as the chicken and egg.
It should be a serious question when you’re doing container gardening. What do you believe is more important; the plant or the container?
The answer is different for everybody but for me it’s an easy answer.
The Container! 
Let me explain…
The container you’re planting the plants into can often be the most expensive part of your gardening budget. You put a lot of time and thought into picking out the right container. From selecting the right location, to finding the exact color or style you want to use. You may also need to consider finding a container in your price bracket. Finally, you need to place the container in its permanent position, and if it’s a large container, that may take extra manpower.
It could easily be a container you’ve had around the house. Perhaps one you’ve enjoyed for years and now want to highlight. Perhaps it was a gift and you want to give it a place of honor. Or maybe when you were at the local garden center you saw it in your heart cried out “I’ve got to have it”. In all those instances you selected the container before you had the plant. Once the container has been placed in the location that you want, you can begin your selection of plants.
It’s hard to select the plants until you know where they will go and how much room you have for planting again. This supports my reasoning of the container being the more important piece of the equation. If your plant choice requires a lot of drainage, you need to know your container has substantial drainage holes.
And another reason the container is so important is because the container is the one piece it can be reused year after year. Once this becomes a stable foundation for your planting, you can enjoy your plants; changing the selection in the container every year or even every season. Changing the container every year could get to be a very expensive habit.
So, the next time you go to the garden center, head over to the container section first. Once you find the right container, then go have fun in the flower and plant area. Take your time picking out the plants that will be perfect for that container so you can enjoy them for as long as possible.