Raised vegetable beds are more productive.
When filled with organic soil, 1 foot high and no more than 4 feet wide, they assure good root growth, high yield and an extended growing season.
They should be constructed in rectangular or square shapes with 2 x 12’s and 
rebar or of recycled plastic timbers such as Frame It All, available at Aqua Supply & Irrigation, East Amherst. Just remember , never use pressure treated wood to prevent soil contamination.
Composted soil delivery is available at CJ Krantz Topsoil. Also expect to freshen up the soil level after a growing season to bring the soil back up to the top of the boards.
And while you’re at it, visit Fruition Seeds for your organic flower and vegetable seeds.