I've found that it can depend on the cultivar. If I'm not happy with the performance of a plant I'll try another location with different amounts of sun and see what happens. But there are other factors too. I did an experiment with 'Plastic' one year. I grew it in the ground and also in a container right next to each other for a year. Here is the result - same plant, same sun, amount of moisture, etc. I thought the results were pretty interesting!
