It's hard to say. There were deep discounts on baubles, wreaths, runners, and all sorts of decor during the Black Friday sales. While there won't be another major sales period pre-Christmas, you could still get a good deal when you shop the store-specific holiday sales at Amazon, Target, Walmart, and other major home stores.
If you think you missed out on a good deal, don't panic: you'll still be able to buy Christmas decorations online and in store right up until the big day. You might just have to pay a little extra.