ArtichokeLove, about 15 years ago, I bought some Alpine Strawberry seeds. I'd found and eaten a few in the wild and was looking forward to more productive plants with larger berries.
They were not. Oh, maybe more productive - I don't know. The berries were so small that it was ridiculous. They were half the size of peas!
Disappointed, I sat the plants at the edge of the lawn in their pots. They escaped!!! Their new colony in the lawn amounted to nothing. After 5 or 6 years, it was about 2' square.
Well now! I have about 25 square feet of the things! They limit lawngrass growth by about 50%, plus. Of course, the berries continue to amount to nothing and you can't really see the plants unless you are standing within 10' but they are taking up more area every year.
Interesting that I had chickens during some of this time and they would walk right past the tiny ripe berries. I don't know if their color vision wasn't good enough to see them or they just didn't care about eating them.
Steve