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A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
Click name to see details: Calamagrostis ] Calamintha ] Campanula ] Catananche ] Centaurea ] Cephalaria ] Cirsium ] Commelina ] [Coreopsis] [ Cosmos ] Crocosmia ] Cynara ]
Cosmos

Cosmos are well known garden annuals but there are a few perennials to be had as well. They can be treated much like a Dahlia, and exhibit the same degree of hardiness.

Cosmos atrosanguineus 

"Chocolate Cosmos" - so called not just for the dark chocolaty red of the petals but also for the hint of chocolate scent in the mature flowers.  The flowers are held on wiry stems.  Plant deeply if you plan to leave the tubers in the ground but don't expect flowers before the end of July. Alternatively dig up the tubers in early winter, pot up and store frost free until late winter when you should commence watering. Plant out in late May or whenever the prospect of frost has passed for your garden. Keep well dead headed; it is tidier to cut off the stems a their base rather than just nipping off the dead flower. These plants are sterile so they won't seed.