We all start somewhere, and you may find that those fast growers now might want to take over tomorrow. Funny, I
first grew Valeriana supina in a trough and it grew and spread so much and so fast the first and second year, that I labeled it as invasive. But in a 3.5 inch pot it just stays alive.
For scale, the pink behind is a normal Dianthus callizonus, about 2-2.5 inches high.