What type of weed is characterized by oblong leaves and tiny white flowers often found in display gardens?

The most accurate identification of the weed described, characterized by oblong leaves and tiny white flowers often found in display gardens, is commonly associated with chickweed. Chickweed has distinctive small, oval-shaped leaves and produces white flowers that are typically small and star-like in appearance. This weed frequently thrives in cooler temperatures and can be commonly found in cultivated or garden settings, where it competes with desired plants.

In contrast, knotweed generally has more elongated stems and leaves, and it is known for its invasive nature rather than the oblong leaf and flower characteristics mentioned. Dandelions showcase broad, jagged leaves and produce bright yellow flowers, which differ significantly from the description provided. Plantain also presents a different leaf shape and flower spike that does not align with the characteristics of oblong leaves and tiny white flowers. Thus, chickweed is the most fitting response based on the detailed description provided.