I loaded the mod into an existing save file. No problem so far, I'm having a lot of fun with it, so first of all: thanks for the great mod. But i can't unlocking Tree Seeding. I chopped many, many Trees and seedet many, many Seeds. No unlocking. Any Idees?

elaborate? tree seeding was not changed as a tech so it cant have been aop. tree seeding only obtains a new effect but the way to unlock it is the same, which is researching it

I discovered the problem when I realized I didn't have the Wood Plank recipe. While checking the Factoriopedia and the Tech Tree, I noticed that I was missing the "Tree Seeding (undiscovered)" technology. I can't add it to the research queue because it's locked with "Technology is unavailable".

do you have other mods

Yes, probably too many mods. I'll try activating the technology via the console.