Tom, I have my own mixture of ground covering for Fall.
I use a plastic shoebox that has a tight lid.
I throw a handful of various fall colored flocks, ground foams, 2 mm static grass, several spices (Oregano, All Spice)
fall leaves and 1 or 1/2 inch broken up twigs. And whatever old Tea leaves you may have lying around.
I'm sorry that I don't have exact measurements, but I just eyeball it. Perhaps use a small 2 or 4 ounce cup and fill it with each of the ingredients.
Then I mix it all up in the box.
At his point, you can add whatever you like to get it to look like you want it too. More spice? More leaves? More or less sweeten to taste.
The secret ingredient is the 2 mm static grass. It really adds to the illusion and pulls everything together.