Ground and soil are not the best terms to use because not every ground is the same. I've seen plenty of soil pictures on this and other sites and I wonder if anyone takes any time to help develop really good loam. I'm not saying I have the best but i certainly know the only way to really improve things is to really work in a lot of organic or as I call it orgasmic matter into the soil. I call it that because your best friend the earthworm and going to going to town on that and help aerate the soil. Many ways to go about it but deep rich loam with lots of trace minerals and organic matter that is cared for in the winter with a cover crop or catch crop will beat any bucket and day of the week. Container gardening is good but just think about all those roots with no where to go. Now imagine taking your garden fork and sinking in nice and easy and deep. Raised beds are good too but don't be lazy and just set up boards and fill it in. Start by rototilling or tilling the native soil. It's full of nutrients that's locked up. Till it really well then work in cow manure, peat moss, leaf compost, compost, horse manure, sea weed, kelp, other fish related products. Adjust the ph and make sure you don't leave it bare to wither away. Cover crop or green manure does wonderful things for the soil and helps prevent erosion. Still not saying container garden is bad(love my San Marzano tomato plant I started late...nice lush green leaves and fruit developing)just saying don't over look that garden. You can also be growing vegetables and composting those things to side dress your containers. I gave my tomato plant my best compost and it is loving it. MJ likes compost too.