Talk:Towering Treat Garden/@comment-27197261-20171112162448/@comment-30071180-20171113020025

You need to be growing Pumpermelons and Dragon Root next to each other to unlock Cubetuber and/or Zazzberries and Omega Squash next to each other to unlock Nubbleberries.

You may have to try several times for it to unlock. The Towering Treat Gardens, must also be touching.

There is more detail in the Game Updates thread.