Ed, why in the fall?? If you have a spot I would do it ASAP!!! Just remember to add a lot, I mean A LOT of organic matter to hole you dig for it. Mine is a tiny bit higher then the surrounding area. Here's a picture of it from when I first planted it in 2012 and now - I made a mistake earlier, this will
be the 5th season I've had it.
When I first put in the garden, I dug and tilled the area from inside the black edging - about 2' (going to expand it a little this year), and back up toward the house by the rope and down the side of the house. A friend helped and ran the tiller - talk about labor!! The next year I put in the raised beds - should have done that from the beginning instead.
