Not all invasions are negative.
Consider a patch of earth behind my building where “stump killer” was spilled. It’s powerful stuff. I’m not sure it killed the stump the person intended — but it killed all green and growing things in a several yard radius.
Mother Nature is tough. Leave her alone (or grant a little encouragement) and she can heal a multitude of wounds.
When the English ivy and another ground cover invaded — I smiled. We had plants. With roots which would at least slow down the erosion of the bare dirt.
I’m encouraging another invasion in my front flower bed. My favorite shade loving blossom is lily-of-the-valley. A co-worker gave me a few starter plants. Then several years later, a neighbor gifted me some lamb’s ears. They are advancing on each other.
Approaching plant battle?