It is imperative to check what zone your plants are hardy to, prior to purchasing them.
The zone number will specify the plant's life cycle in certain areas throughout the United States.
Annuals:
are plants that complete their life cycle in one growing season, and will not survive through the winter.
Most annuals will bloom all summer, but they must be replaced or replanted every year.
Biennials:
are herbaceous plants that require two years to complete their life cycle.
The first year produces vegetative growth while the second year produces blooms & seeds.
Herbaceous Perennials:
are plants that survive through more than two growing seasons.
They die back to the ground in the winter time and re-grow (return) in the spring.
Plants that are labeled zone 5 and below are hardy here. This means that they will survive year to year planted in the ground.
Plants that are labeled zone 6 or higher will not survive our cold winters.
A select few may be brought inside as house plants once night temperature drop below 55 degrees fahrenheit.