Spring Flowerbox

we create the floor and the two side walls
i have adapted the dimensions to the glasses i have

a rectangle and then select edit node
add another node and drag the two corners down to create a point at the top

duplicate the slats from the fence

here it is important not to make them as wide as the ground or all the slats of the fence
on each side leave out the thickness of the wood in my case it was 3mm

create a rectangle and click on edit node
add many nodes in the top bar
now you can customize the nodes so that it looks like grass
i recommend setting the nodes to total asymmetry 

create a circle that is already more in the direction of a leaf
adjust it with the nodes until you are satisfied
make a copy and adjust both as you like it
copy both twice and rotate the copies to each other
select all the leaves and connect them to each other
create another circle for the center
select the pattern on the left side
place the circle and the pattern on top of each other and substract them

Cut everything out and put together
I painted the parts