Should I remove flat bed and replant as a raised bed?

[Anonymous]

I just enlarged a flower bed with perennials, and covered today with mulch.
Then I realized I should have added soil to make it a raised bed..

Is a raised bed all that beneficial? Should I dig up and re-do?
Will a raised bed make a difference for containing the mulch?
(Is that why professionally done flower beds are often raised?)

[Anonymous]

Is there any particular reason that you want a raised bed, or is it just that you have heard that raised beds are better?

[Anonymous]

If they are plants that will do fine in your non-raised soil, I'd leave them. If they require good soil, I'd raise the bed. That's the usual reason for raised beds, bad soil (like our clay).