Bacopa

Bacopa (Sutera cordata) is a popular, fast-growing trailing annual (or tender perennial) prized for its dense, mat-forming habit and prolific, small, five-petaled flowers, which often have a yellow center and bloom from spring to fall. Growing 4–6 inches tall and spreading 12–18 inches, it is ideal for cascading over containers, hanging baskets, or for use as a groundcover. 

Key Characteristics and Care
Appearance: Features small, serrated, heart-shaped green leaves on long, flexible, trailing stems.
Colors: Commonly available in White as well as Lavender/Sky Blue.
Light/Water: Thrives in full sun to partial shade, requiring consistent, even moisture but not standing water.
Maintenance: Self-cleaning (no deadheading needed).
Habit: Excellent for spiller plants in mixed containers.
Hardiness: Generally grown as an annual, though perennial in zones 9–11.