Variety traits

Dahlia inflorescence diameter

Dahlia Cav.

This trait is a key factor for cultivar testing and classification of dahlias, determining the intended use of the variety, agrotechnical specifics, and requirements for peduncle strength.

In the reference 31 varieties crop Dahlia, where this is mentioned in the description.

For dahlias, the inflorescence diameter is measured at the widest point of a fully opened flower on fresh and typical specimens. According to the classification of the American Dahlia Society, varieties are divided into groups ranging from giant (over 25.4 cm) to miniature and pompon (less than 5.1 cm). In international UPOV practice, this metric is used as an obligatory criterion for assessing the distinctness, uniformity, and stability of a cultivar.

Inflorescence size directly affects maintenance: large-flowered forms require disbudding and the removal of excess buds to form high-quality flowers, and also require stronger peduncles. During cultivation, it is necessary to maintain an optimal nutrient balance, as excessive nitrogen fertilization can negatively affect the size and quality of inflorescences in favor of vegetative mass.

General information about the subject — on the page Flower diameter.

Sources8

Varieties of Dahlia mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.