Grow sweet strawberry in a vertical PVC tube is great solution for small garden or yard. Vertical planter will save you a lot of space, at the same time keep plants out of reach from garden insect pests AND enable you to switch to hydroponics.
Top up with the remaining mixture, screed the surface, and flatten with a trowel. Repeat for the bench top using the identical amount of concrete mix. Cover the parts with plastic sheeting, and leave to cure for a couple of days.