I have received 2 Ivy brews and 2 muds from the 4 hr adventure (probably 6 sent). I have one returning in 2 hours and 1 more to send.
I have chopped all my dead trees, collected from Ivy, and only collected from bushes and cows 2 times more than I needed to upgrade to level 2. I decided to get all my vines, send out as many adventures as I could with the flowers from the dead trees (looks like I got about 45 total). Once my last 2 adventures return, then I will know how many of each item I need. Not needing to upgrade the throne quickly helps with this strategy.