Botanical names: Sutera cordata, Bacopa cordata
Common name: Snowflake
Family: Plantaginaceae
Origin: South Africa
USDA Plant Hardiness Zone Map
This dainty little plant is usually grown as a trailing plant in baskets, but can be used as groundcover. Keep soil moist, well drained, flowers will drop if underwatered.
It is usually sold as Bacopa 'Snow Flake' or Bacopa 'Abunda Blue'.
Link to this plant:
https://toptropicals.com/catalog/uid/sutera_cordata.htm