So, the wiki mentions covering the Honey Tree and returning to it
later with 3 normal Honey for Flapple or 1 Super Honey for
Appletun. I was able to evolve Applin into Appletun after about 1-2
hours of checking the tree. However evolving it into Flapple
doesn't seem to work, because I've checked back on the tree every
now and then (with 3 normal Honey) for nearly 16 hours in total
(including yesterday) and it's not got the prompt to evolve. I
don't know if this is a bug, me just being unlucky, or missing some
other condition needed, so posting here.