Pip planting and the resin tree

[Jann5s]

I often go back to this excellent manual on pip planting:

https://forums.kleientertainment.com/forums/topic/110299-pip-planting-everything-you-need-to-know/?do=findComment&comment=1242580

But now I'm wondering, how does the new resin tree interact with the pips? Does it count as a plant?

I have this pip that is not willing to plant, and I'm suspecting the tree, or made a mistake counting to 5

 

Edit:

Well, I've got my answer, while I was posting this, the pip planted the waterweed. Mystery solved I guess,