Hi Charley, I'm a newbie, so others may have a better way of seeing but here's what I do.
From this page:
https://garden.org/forums/view...
Click the "Upload a banner" link in the box on the right. (It's in line with the top of the list.)
It will open in a new window or tab.
Here you can see a list of all the banners you've submitted and their status - awaiting approval, approved, approved for (date it will go live).
I'm not sure I've ever received a note saying when it will go live, I just check this page.
I hope this helps, but if you can't find your list or you get stuck, let me know and I'll try to explain better!