nah.
In the beginning, there was a war.
Now I don't know whether they're on the side of or against Thanos, but for some reason or other, there were celestials destroying worlds.
Remember in Guardians of the Galaxy 1?
That's the power stone. Purple in color.
Now I'm betting that when that world exploded, the fragments of that homeworld irradiated w/ powerstone energy became meteorites, and one of them was the one that landed on earth, and that is what created the heart shaped herb. Which is why the herbs are purple.
Remember at the end of Guardians, when Peter grabbed the power stone?
What happens? He sees his mom...
Just like T'Challa and Erik are able to see their dads.
power stone color is the same as the color pallette that MARVEL has chosen aesthetically for Black Panther: Purple, so I believe at the end each major avenger will grab a powerstone and they'll use it to defeat thanos together, and Black Panther will end up with the power stone.
At the end of the whole Infinity Saga, A post credits scene will involve an MCU Illuminati like in the comics, and in this movie version T'Challa will keep the power stone. And he will hand it off to Shuri, who will then synthesize it to restore the Heart shaped herb garden.