To be sure, I know it takes a while. I waited half an hour for the bamboo shoots to grow. I then tried restarting and playing the path of good and the tree wouldn't grow. My partner was able to get them growing by placing them in the exact spots that I had previously. With no other differences in our patterns regardless of team He could grow them and I could not.

Honestly, this pack is pretty much dead in the water so don't expect any fixes or updates any time soon. However, using the latest version I was able to get several plants and trees to grow using the provided light sources (glow plants and the fire in the nether).