Benefits of Raised Garden Beds
A raised bed garden requires a much smaller footprint than a traditional row planted garden, so you don't need a lot of space to garden
Raised beds offer the ability to grow plants closer together, utilizing every inch of space (vertical supports and succession planting can further the efficiency)
Since raised beds can be densely planted, weeds have less room to grow
The soil in raised beds warms up faster in the spring, compared to in-ground beds, allowing you to extend the growing season
Soil quality is pivotal to a successful garden. Since you're starting with quality soil, you need to worry about regularly testing and amending your soil
Raised beds mean less bending over (or none, depending on the height of your beds)
Bottomless beds allow excess water to escape, which prevents root rot and allows worms to enter. Bottomless beds help plants access the nutrients they need from below the ground
If you’re thinking about using a steel tub for a raised garden bed, check out this post for an alternative that looks similar, but holds up a bit better.