What you need is a ring for base, I have used the top part of curd contanier, vegetable/onion net- I have used the green coloured net, carton boxes preferably green, red, purple to avoid the hassle of colouring.
Cover the ring with the net and stitch the ends as shown here
Cut flowers and leaves from carton boxes
I have stritched a brown carton box ring onto the net to make pasting the remaining decorations onto it
Here goes the first ring of berries and leaves
The next layer of leaves and flowers
And this is how it looks on our door now :)