Removing Plants?

[Ociamarru]

I'm just curious, is there any way to remove plants? My strategy is that I have one 'hording world' where I move all of my Seedlings, and all of its plants are the Coniferous-Missile plants, but the rest are just breeding worlds to make more Seedlings. However, a couple worlds typically have one or two Coniferous-Missile plants left after I conquer them. I couldn't find a way to remove them, either, and though it isn't TERRIBLY awful, it still is a minor annoyance. So, can I change the type of plant or remove it altogether, somehow?

[Vanger]

No, you can't.

In rare cases, when assault is massive, more then one tree gets destroyed. But, sadly, AI isn't very keen in amassing armies.

[McGoldi]

In all cases, when a planet is ridden and a tree ist bursted to pixels, always a new breeding tree is growing independent of the tree that was growing there before. I would like to see a possibility to change the type of a tree, or to root it up, too.