If you leave them they will just run to seed so best to start again
There are several different types of Verve, some are good some not.
I believe it needs to be grown in flowing water, it's often used in Koi pond filters.
That's because it's a T&M product Gardengirl
I would go with a Rhino every time.
Yes I see your concerns but the only place I would worry about is where the posts meet the ground.
Mine are not showing any signs of growth yet, but they soon will.
Sounds like the wood was not strong enough for the weight of soil, any photos of it?
Or like this ?
I can't see the point in applying a preservative to timber that already has been pressure treated with preservative, not when it's so new.