Hello Asif and welcome to the forum, as ever it depends on details like how many, if any, couch and dandelion roots are still alive in the main part of the bed, how much manure you spread etc.
You have made a large and impressive bed but in this first year I would be cautious about weed regrowth esp where there are still lots of roots, I would keep some mypex over that end all year and plant something through it e.g. squash. Also have the mypex running over the paths, you have to clean the paths of weed roots too, otherwise couch grass for example just spreads back into the bed.
