He's saying to allow for more then 10 days of Veg if you are looking to gauge the difference in the two; or at least be able to yield anything (within your 90 days)
You have 90 days; so i suggest you get a "DNA 60 day wonder auto flowering plant"' otherwise you will not be 100% ready within that time frame.
Thank you for your research!
I can only grow during these 90 days but I have a solution for dry and cure.
Btw I started some autoflowers( 6 AK, 3 Speed Devil, 6White Dwarf) 8 days ago... and 14/15 sprouted.