Heya! Thanks for taking the time to play and rate! And thanks for your appreciation, I appreciate it :D
I think what you had was a UX bug. I had originally wanted to hide the cost of farms until they were unlocked but it ended up being hidden if you couldn't afford it in general. I think if you would have had enough currency after unlocking it (pretty sure it's 40 for apple farms) you would have been able to place it. I also noticed that bug when I did my own playthrough recording after the jam