Okay, I'm back and the spreadsheet is now 100% complete! Thank you for the reports!

1) Lavender in Emerald Moss:
Success! This only took me 4 trees to obtain, and the person who reported it is correct. They are found on the trees that also yield Gridanian Walnuts at a sweet spot of -2.

2) Ash Logs off of cacti in Drybone:
Success! It took me a while, but I did finally obtain some Ash Logs! They're definitely only found on cacti, so if you're looking to obtain Ash Logs in any respectable quantities though, Drybone is definitely NOT the place you want to go. Thank you for the information regarding this item!

3) Mistletoe in Cedarwood:
I was unable to get any Mistletoe after 48 logging attempts at the Mistletoe sweet spot of +1. I will not be adding it to my spreadsheet, but if someone has evidence to the contrary, please provide me with a screenshot.