A deciduous plant (tree or shrub) will go dormant (its rest period) beginning when either the weather starts becoming colder (40’s to 50’s) or when an area experiences a hard frost (temperatures dropping below 32 degrees, usually overnight). It will begin to lose its leaves at this time. Blooming plants have specific periods when they bloom. They aren’t always in bloom. Many will bloom either in spring or summer.
“Evergreen” is used to describe plants (trees/shrubs) that do not go dormant and retain their leaves or needles. This generally refers to pines, spruces, boxwoods, junipers, yews and holly. Broadleaf evergreens are plants that retain leaves (very thick leaves) year round. But, they do shed the leaves periodically. This will apply to plants such as azaleas, rhododendrons and photinia.
Perennials are (usually) smaller plants which die completely back to the ground after cool weather or frost sets in, then return the following season. Annuals are plants that you have to set out every year as they will die completely. These include marigolds, pansies, geraniums, and other decorative often flowering plants.