Judging by the images, we might get more corns 'o' copias if we wait a day or two before picking them. There is also potential for new items to be aquirable, though it seems unlikely.--Tombot (talk) 02:34, 3 November 2016 (UTC)
The images suggest the yield might be 1, 3, 5, 8, 11, 15 cornucopia if left to grow over successive days.
On the forum one user said the hovertext after 2 days of growth said it would yield 3 cornucopia.
Another user confirmed that harvesting after 3 days growth yielded him 5 cornucopia.
Also there was mention on the KoL podcast (hasn't been transcribed at time of writing) that the growth isn't linear but similar to the fibonacci sequence which would lend credence to the numbers I postulated above.
Obviously more spading is required but sadly I don't have it myself (as yet, will soon).
--Malibu Stacey (talk) 16:49, 3 November 2016 (UTC)
Speculation: There are 10 separate cooked Thanksgetting food items available, each with a size of 2. Will there be a trophy or similar reward for eating them all on one day? (Only possible during the Feast of Boris). Amish Information Systems (talk) 11:43, 17 November 2016 (UTC)