These are annual plants with small yellow flowers which open during the night.

It is an annual plant growing to 10-50 cm in height.

It is an annual plant growing to about 12 cm tall.

This distinction is also related to the difference between annual and perennial plants.

It is an annual plant growing to 20-100 cm tall.

It is an annual plant that originally came from Mexico.

For example, annual plants have exactly one generation per year.

Learn about the many ways to use annual plants.

In colder areas it is grown as an annual plant.

In areas too cold for winter survival, it can be grown as an annual plant.