You get the 5 red Acer trees if you force close your game. I don't have the goals yet from s8 and I'm out for a few hours now so I'll write up what I have later today.
Do we know if Ivy is a guaranteed drop?
Think it came from a plant in log (took more than one)
Yes, 4th piece came from plant in log, I think I got it on my second one.
Plant in a log is a clue