Here's a great article from Tropica about this plant written by our friend and brilliant aquascaper George Farmer: https://tropica.com/en/articles/bacopa-caroliniana/

Bacopa caroliniana originates from US and has been used as an aquarium plant for many years. Stems become 4-12 inches long and 1 1/41 1/2 inches  wide, branching willingly from the bottom. It has few demands and thus very convenient for beginners. Its slow growth rate makes it one of the few stem plants that do not need much attention.
Like most stem plants, it is most decorative when planted in small groups. Easy to propagate by cuttings; take a side shoot and plant it in the bottom.

Pots are brimming with plants and have lots of mass and healthy,
well-developed roots.
Most pots can be divided into several portions or individual plants which are planted separately.