Perennials
In horticulture, the term "perennial" is generally used for the category of plants that live for more than one year but are not substantially woody (even though trees and shrubs are technically perennial too).
In particular, the term is associated with flowering plants associated with cottage gardens and tradtional English-style gardens, such as salvias, chrysanthemums and many of the daisies.
Other Daisies (Argyranthemum, Gazania, Aster, Chrysanthemum, Osteospermum and others
General
Deadheading Washington State University Clark County Extension
Alstroemeria
Alstroemeria Advice for professional growers from Western Australia Department of Agriculture
Angelonia
Dahlia
Dianthus and Carnation
Others
Heliotrope ( Heliotropium arborescens or peruvianum) Washington State University
Artemisia Kentucky Garden Flowers, University of Kentucky
More to come in future updates
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