Begonia doubleness

During begonia variety trials, doubleness is classified as a flower type, determined visually through a gradation from single to double forms. Biologically, this process is the result of homeosis, in which reproductive organs are replaced by petals, significantly altering the plant's generative program.

Double varieties require more resources and therefore possess lower durability and high sensitivity to the condition of the root system. Any breaches in agronomic practices, including nutrient deficiency or issues with gas exchange in the substrate, lead to a decrease in flower density and incomplete petal opening.

For an agronomist, the degree of doubleness serves as an indicator of the stability of growing conditions. Irregular flower geometry or bud reduction in these forms signals the need to adjust light parameters, irrigation, and nutrition regimes, as the plant uses resources less economically with this type of flowering.