Answered Planks production Boost

[DeletedUser1805]

I'm trying to research planks production boost. I have the required gold, and have a planks plant in production but the research bar is "grayed out". What else do I need to do to be able to research that? All of my other researches have gone well.

 

[DeletedUser1805]

I just figured it out. I didn't realize you had to activate all the manufacturing to unlock boosts for Planks.

 

[DeletedUser1295]

You will need to research all level 1 manufactory's before you can research the planks production boost.
Do hope this answer helps you, if not please let it know!

P.S. Good to hear you found this yourself, good luck with the researches!