Probably the most underused vegetables, the Perennials reward you with years of growing so it pays dividends to get there growing conditions right as they are in the Same ground for a number of years
If you want the best Vegetables the effort of constructing a deep bed for vegetable growing is well worth the effort. This applies to some of the deep rooted vegetables that are going to stay in the bed longer than one season or to overcome a problem with your natural soil being either to heavy or nutrient/food starved.First made popular by Geoff Hamilton I have been growing in these for over 30 years, they work and improve with time
One variation I use a lot is a No dig version of a raised bed this link shows you how to build a No dig bed in under 30 minutes